D.
_Dacelo_, sexual difference of colour in, ii. 174.
_Dacelo Gaudichaudi_, young male of, ii. 188.
DAL-RIPA, a kind of ptarmigan, i. 306.
_Damalis albifrons_, peculiar markings of, ii. 301.
_Damalis pygarga_, peculiar markings of, ii. 300.
DAMPNESS of climate, supposed influence of, on the colour of the skin, i. 116, 242.
_Danaidæ_, i. 387.
DANCES of birds, ii. 68.
DANCING, i. 232.
DANIELL, Dr., his experience of residence in West Africa, i. 245.
DARFUR, protuberances artificially produced in, ii. 339.
DARWIN, F., on the stridulation of _Dermestes murinus_, i. 379.
_Dasychira pudibunda_, sexual difference of colour in, i. 398.
DAVIS, A. H., on the pugnacity of the male stag-beetle, i. 375.
DAVIS, J. B., on the capacity of the skull in various races of men, i. 146; on the beards of the Polynesians, ii. 322.
DEATH-RATE higher in towns than in rural districts, i. 175.
DEATH-TICK, i. 384.
DE CANDOLLE, Alph., on a case of inherited power of moving the scalp, i. 20.
DECLENSIONS, origin of, i. 61.
DECORATION in birds, ii. 71.
_Decticus_, i. 355.
DEER, spots of young, ii. 184, 303; horns of, ii. 243, 248; use of horns of, ii. 252, 263; size of the horns of, ii. 259; female, pairing with one male, whilst others are fighting for her, ii. 269; male, attracted by the voice of the female, ii. 276; male, odour emitted by, ii. 279; development of the horns in, i. 288; horns of a, in course of modification, ii. 255.
DEER, Axis, sexual, difference in the colour of the, ii. 290.
DEER, fallow, different coloured herds of, ii. 295.
DEER, Mantchurian, ii. 303.
DEER, Virginian, ii. 303; colour of the, not affected by castration, ii. 288; colours of, ii. 289.
DEERHOUND, Scotch, greater size of the male, i. 293, ii. 260.
DEFENSIVE organs of mammals, ii. 263.
DE GEER, C., on a female spider destroying a male, i. 339.
DEKAY, Dr., on the bladder-nose seal, ii. 278.
DEMERARA, yellow fever in, i. 243.
_Dendrocygna_, ii. 185.
_Dendrophila frontalis_, young of, ii. 220.
DENNY, H., on the lice of domestic animals, i. 219.
_Dermestes murinus_, stridulation of, i. 379.
DESCENT traced through the mother alone, ii. 359.
DESERTS, protective colouring of animals inhabiting, ii. 224.
DESMAREST, on the absence of suborbital pits in _Antilope subgutturosa_, ii. 280; on the whiskers of _Macacus_, ii. 283; on the colour of the opossum, ii. 286; on the colours of the sexes of _Mus minutus_, ii. 286; on the colouring of the ocelot, ii. 287; on the colours of seals, ii. 287; on _Antilope caama_, ii. 289; on the colours of goats, ii. 290; on sexual difference of colour in _Ateles marginatus_, ii. 291; on the mandrill, ii. 293; on _Macacus cynomolgus_, ii. 318.
DESMOULINS, on the number of species of man, i. 226; on the musk-deer, ii. 281.
DESOR, on the imitation of man by monkeys, i. 44.
DESPINE, P., on criminals destitute of conscience, i. 92.
DEVELOPMENT, embryonic, of man, i. 14, 16; correlated, ii. 130.
DEVIL, not believed in by the Fuegians, i. 67.
DEVIL-CRAB, i. 332.
DEVONIAN, fossil insect from the, i. 360.
DEWLAPS, of cattle and antelopes, ii. 284.
_Diadema_, sexual differences of colouring in the species of, i. 388.
_Diadema anomala_, mimickry by the female of, i. 413.
_Diadema bolina_, i. 413.
DIAMOND-BEETLES, bright colours of, i. 367.
DIASTEMA, occurrence of, in man, i. 126.
DIASTYLIDÆ, proportion of the sexes in, i. 315.
DIODORUS, on the absence of beard in the natives of Ceylon, ii. 321.
_Dicrurus_, racket-shaped feathers in, ii. 73; nidification of, ii. 167.
_Dicrurus macrocercus_, change of plumage in, ii. 179.
_Didelphis opossum_, sexual difference in the colour of, ii. 286.
DIFFERENCES, comparative, between different species of birds of the same sex, ii. 192.
DIGITS, supernumerary, more frequent in men than in women, i. 276; supernumerary, inheritance of, i. 285; supernumerary, early development of, i. 292.
DIMORPHISM in females of water-beetles, i. 343; in _Neurothemis_ and _Agrion_, i. 363.
_Dipelicus Cantori_, sexual differences of, i. 369.
DIPLOPODA, prehensile limbs of the male, i. 340.
_Dipsas cynodon_, sexual difference in the colour of, ii. 29.
DIPTERA, i. 348.
DISEASE, generated by the contact of distinct peoples, i. 239.
DISEASES common to man and the lower animals, i. 11; difference of liability to, in different races of men, i. 216; new, effects of, upon savages, i. 238; sexually limited, i. 292.
DISPLAY, coloration of Lepidoptera for, i. 395; of plumage by male birds, ii. 86, 96.
DISTRIBUTION, wide, of man, i. 137; geographical, as evidence of specific distinctness in man, i. 218.
DISUSE, effects of, in producing rudimentary organs, i. 18; and use of parts, effects of, i. 116; of parts, influence of, on the races of men, i. 247.
DIVORCE, freedom of, among the Charruas, ii. 372.
DIXON, E. S., on the habits of the guinea-fowl, i. 270; on the pairing of different species of geese, ii. 114; on the courtship of peafowl, ii. 121.
DOBRIZHOFFER, on the marriage-customs of the Abipones, ii. 374.
DOGS, suffering from Tertian ague, i. 13; memory of, i. 45; domestic, progress of, in moral qualities, i. 50; distinct tones uttered by, i. 54; parallelism between his affection for his master and religious feeling, i. 68; sociability of the, i. 74; sympathy of, with a sick cat, i. 77; sympathy of, with his master, i. 77; possible use of the hair on the forelegs of the, i. 193; races of the, i. 229; diverging when drawing sledges over thin ice, i. 40; dreaming, i. 46, 158; exercise of reasoning faculties by, i. 48; their possession of conscience, i. 78; numerical proportion of male and female births in, i. 304; sexual affection between individuals of, ii. 270; howling at certain notes, ii. 333; rolling in carrion, ii. 281.
DOLICHOCEPHALIC structure, possible cause of, i. 148.
DOLPHINS, nakedness of, i. 148.
DOMESTIC animals, races of, i. 229; change of breeds of, ii. 369.
DOMESTICATION, influence of, in removing the sterility of hybrids, i. 222.
D’ORBIGNY, A., on the influence of dampness and dryness on the colour of the skin, i. 242; on the Yura-caras ii. 347.
DOTTEREL, ii. 203.
DOUBLEDAY, E., on sexual differences in the wings of butterflies, i. 345.
DOUBLEDAY, H., on the proportion of the sexes in the smaller moths, i. 311; on the attraction of the males of _Lasiocampa quercus_ and _Saturnia carpini_ by the female, i. 312; on the proportion of the sexes in the Lepidoptera, i. 312; on the ticking of _Anobium tessellatum_, i. 385; on the structure of _Ageronia feronia_, i. 387; on white butterflies alighting upon paper, i. 400.
DOUGLAS, J. W., on the sexual differences of the _Hemiptera_, i. 349; on the colours of British _Homoptera_, i. 352.
DOWN, of birds, ii. 80.
_Draco_, gular appendages of, ii. 33.
DRAGONET, Gemmeous, ii. 7.
DRAGON-FLIES, caudal appendages of male, i. 344; relative size of the sexes of, i. 347; difference in the sexes of, i. 361; want of pugnacity by the male, i. 364.
DRAKE, breeding plumage of the, ii. 84.
DREAMS, i. 46; a possible source of the belief in spiritual agencies, i. 66.
DRILL, sexual difference of colour in the, ii. 291.
_Dromœus irroratus_, ii. 204.
_Dromolæa_, Saharan species of, ii. 172.
DRONGO shrike, ii. 179.
DRONGOS, racket-shaped feathers in the tails of, ii. 73, 83.
DRYNESS, of climate, supposed influence of, on the colour of the skin, i. 242.
_Dryopithecus_, i. 199.
DUCK, harlequin, age of mature plumage in the, ii. 213; breeding in immature plumage, ii. 214.
DUCK, long-tailed, preference of male, for certain females, ii. 122.
DUCK, pintail, pairing with a wigeon, ii. 114.
DUCK, voice of the, ii. 60; pairing with a shield-drake, ii. 114; immature plumage of the, ii. 188.
DUCK, wild, sexual differences in the, i. 268; speculum and male characters of, i. 291; pairing with a pintail drake, ii. 115.
DUCKS, dogs and cats recognised by, ii. 110; wild, becoming polygamous under partial domestication, i. 270.
DUGONG, tusks of, ii. 242; nakedness of, i. 148.
DUJARDIN, on the relative size of the cerebral ganglia in insects, i. 145.
DUNCAN, Dr., on the fertility of early marriages, i. 174.
DUPONT, M., on the occurrence of the supra-condyloid foramen in the humerus of man, i. 29.
DURAND, J. P., on causes of variation, i. 113.
DUREAU de la Malle, on the songs of birds, i. 55; on the acquisition of an air by blackbirds, ii. 55.
DUTCH, retention of their colour by the, in South Africa, i. 242.
DUTY, sense of, i. 70.
DUVAUCEL, female _Hylobates_ washing her young, i. 40.
DYAKS, pride of, in mere homicide, i. 94.
_Dynastes_, large size of males of, i. 347.
DYNASTINI, stridulation of, i. 381.
_Dytiscus_, dimorphism of females of, i. 343; grooved elytra of the female, i. 343.
E.
EAGLE, young _Cercopithecus_ rescued from, by the troop, i. 75.
EAGLE, white-headed, breeding in immature plumage, ii. 214.
EAGLES, golden, new mates found by, ii. 105.
EAR, motion of the, i. 20; external shell of the, useless in man, i. 21; rudimentary point of the, in man, i. 22.
EARS, piercing and ornamentation of the, ii. 341.
_Echidna_, i. 201.
_Echini_, bright colours of some, i. 322.
ECHINODERMATA, absence of secondary sexual characters in, i. 321.
ECKER, figure of the human embryo, i. 15; on sexual differences in the pelvis in man, ii. 317; on the presence of a sagittal crest in Australians, ii. 319.
EDENTATA, former wide range of, in America, i. 219; absence of secondary sexual characters in, i. 268.
_Edolius_, racket-shaped feathers in, ii. 73.
EDWARDS, Mr., on the proportion of the sexes in North American species of _Papilio_, i. 309.
EGERTON, Sir P., on the use of the antlers of deer, ii. 252; on the pairing of red deer, ii. 269; on the bellowing of stags, ii. 275.
EGGS, hatched by male fishes, ii. 20.
EGRET, Indian, sexes and young of, ii. 217.
EGRETS, breeding plumage of, ii. 82; white, ii. 228.
EHRENBERG, on the mane of the male Hamadryas baboon, ii. 267.
EKSTRÖM, M., on _Harelda glacialis_, ii. 122.
_Elachista rufocinerea_, habits of male, i. 311.
ELAND, development of the horns of the, i. 289.
ELANDS, sexual differences of colour in, ii. 288.
_Elaphomyia_, sexual differences in, i. 349.
_Elaphrus uliginosus_, stridulation of, i. 379.
_Elaps_, ii. 31.
ELATERIDÆ, proportions of the sexes in, i. 313.
ELATERS, luminous, i. 345.
ELEPHANT, i. 200; nakedness of the, i. 148; rate of increase of the, i. 135; Indian, polygamous habits of the, i. 267; pugnacity of the male, ii. 240; tusks of, ii. 242, 243, 248, 249, 258; Indian, mode of fighting, of the, ii. 257; male, odour emitted by the, ii. 279; attacking white or grey horses, ii. 295.
ELEVATION of abode, modifying influence of, i. 120.
ELIMINATION of inferior individuals, i. 172.
ELK, ii, 249; winter change of the, ii. 299.
ELK, Irish, horns of the, ii. 259.
ELLICE Islands, beards of the natives, ii. 322, 349.
ELLIOT, R., on the numerical proportion of the sexes in young rats, i. 305; on the proportion of the sexes in sheep, i. 305.
ELLIOTT, D. G., on _Pelecanus erythrorhynchus_, ii. 80.
ELLIOTT, Sir W., on the polygamous habits of the Indian wild boar, i. 267.
ELLIS, on the prevalence of infanticide in Polynesia, ii. 364.
ELPHINSTONE, Mr., on local differences of stature among the Hindoos, i. 115; on the difficulty of distinguishing the native races of India, i. 215.
ELYTRA, of the females of _Dytiscus_, _Acilius_, _Hydroporus_, i. 343.
_Emberiza_, characters of young, ii. 184.
_Emberiza miliaria_, ii. 185.
_Emberiza schœniculus_, ii. 111; head-feathers of the male, ii. 95.
EMBRYO of man, i. 14, 15; of the dog, i. 15.
EMBRYOS of mammals, resemblance of the, i. 32.
EMIGRATION, i. 172.
EMOTIONS experienced by the lower animals in common with man, i. 39; manifested by animals, i. 42.
EMPEROR moth, i. 398.
EMULATION of singing-birds, ii. 53.
EMU, sexes and incubation of, ii. 204.
ENDURANCE, estimation of, i. 95.
ENERGY, a characteristic of men, ii. 328.
ENGLAND, numerical proportion of male and female births in, i. 300.
ENGLEHEART, Mr., on the finding of new mates by starlings, ii. 106.
ENGLISH, success of, as colonists, i. 179.
ENGRAVERS, short-sighted, i. 118.
ENTOMOSTRACA, i. 332.
ENTOZOA, difference of colour between the males and females of some, i. 321.
EOCENE, possible divergence of man during the, i. 200.
EOLIDÆ, colours of, produced by the biliary glands, i. 323.
_Epeira_, i. 337.
_Epeira nigra_, small size of the male of, i. 338.
EPHEMERÆ, i. 341.
EPHEMERIDÆ, i. 361.
EPHEMERINA, proportions of the sexes in, i. 314.
_Ephippiger vitium_, stridulating organs of, i. 354, 358.
_Epicalia_, sexual differences of colouring in the species of, i. 388.
_Equus hemionus_, winter change of, ii. 298.
_Erateina_, coloration of, i. 397.
ERECT attitude of man, i. 141, 142.
ESCHRICHT, on the development of hair in man, i. 24; on a lanuginous moustache in a female fœtus, i. 25; on the want of definition between the scalp and the forehead in some children, i. 192; on the arrangement of the hair in the human fœtus, i. 193; on the hairiness of the face in the human fœtus of both sexes, ii. 379, 380.
_Esmeralda_, difference of colour in the sexes of, i. 368.
_Esox lucius_, i. 308.
_Esox reticulatus_, ii. 14.
ESQUIMAUX, i. 157, 167; their belief in the inheritance of dexterity in seal-catching, i. 117; mode of life of, i. 246.
_Estrelda amandava_, pugnacity of the male, ii. 49.
_Eubagis_, sexual differences of colouring in the species of, i. 389.
_Euchirus longimanus_, sound produced by, i. 381.
_Eudromias morinellus_, ii. 203.
_Eulampis jugularis_, colours of the female, ii. 168.
EULER, on the rate of increase in the United States, i. 131.
_Eumomota superciliaris_, racket-shaped feathers in the tail of, ii. 73.
_Eupetomena macroura_, colours of the female, ii. 168.
_Euphema splendida_, ii. 174.
_Euplocamus erythropthalmus_, possession of spurs by the female, ii. 46.
_Euplœa midamas_, mimickry of, by the female of _Diadema anomala_, i. 413.
EUROPE, ancient inhabitants of, i. 237.
EUROPEANS, difference of, from Hindoos, i. 240; hairiness of, probably due to reversion, ii. 378.
_Eurostopodus_, sexes of, ii. 206.
_Eurygnathus_, different proportions of the head in the sexes of, i. 344.
_Eustephanus_, sexual differences of species of, ii. 39; young of, ii. 220.
EXAGGERATION of natural characters by man, ii. 351.
EXOGAMY, ii. 360, 364.
EXPRESSION, resemblances in, between man and the apes, i. 191.
EXTINCTION of races, causes of, i. 238.
EYE, destruction of the, i. 116; change of position in, i. 147; obliquity of, regarded as a beauty by the Chinese and Japanese, ii. 345.
EYEBROWS, elevation of, i. 19; development of long hairs in, i. 25; in monkeys, i. 192; eradicated in parts of South America and Africa, ii. 340; eradication of, by the Indians of Paraguay, ii. 348.
EYELIDS, coloured black, in part of Africa, ii. 339.
EYELASHES, eradication of, by the Indians of Paraguay, ii. 348.
EYES, difference in the colour of, in the sexes of birds, ii. 128; pillared, of the male of _Chloëon_, i. 341.
EYTON, T. C., observations on the development of the horns in the fallow-deer, i. 288.
EYZIES, Les, human remains from, i. 237.
F.
FABRE, M., on the habits of _Cerceris_, i. 364.
FACIAL bones, causes of modification of the, i. 147.
FACULTIES, mental, variation of, in the same species, i. 36; diversity of, in the same race of men, i. 109; inheritance of, i. 110; diversity of, in animals of the same species, i. 110; of birds, ii. 108.
FAKIRS, Indian, tortures undergone by, i. 96.
_Falco leucocephalus_, ii. 214.
_Falco peregrinus_, ii. 104, 179.
_Falco tinnunculus_, ii. 109.
FALCON, peregrine, new mate found by, ii. 104.
FALCONER, H., on the mode of fighting of the Indian elephant, ii. 257; on canines in a female deer, ii. 258; on _Hyomoschus aquaticus_, ii. 304.
FALKLAND islands, horses of, i. 236.
FALLOW-DEER, different coloured herds of, ii. 295.
FAMINES, frequency of, among savages, i. 333.
FARR, Dr., on the structure of the uterus, i. 123; on the effects of profligacy, i. 173; on the influence of marriage on mortality, i. 175.
FARRAR, F. W., on the origin of language, i. 56; on the crossing or blending of languages, i. 60; on the absence of the idea of God in certain races of men, i. 65; on early marriages of the poor, i. 173; on the middle ages, i. 178.
FASHIONS, long prevalence of, among savages, ii. 343, 352.
FAYE, Prof., on the numerical proportion of male and female births in Norway and Russia, i. 301; on the greater mortality of male children at and before birth, i. 302.
FEATHERS, modified, producing sounds, ii. 63 _et seqq._, 163; elongated, in male birds, ii. 72, 97; racket-shaped, ii. 73; barbless and with filamentous barbs in certain birds, ii. 74; shedding of margins of, ii. 85.
FEEDING, high, probable influence of, in the pairing of birds of different species, ii. 115.
FEET, modification of, in man, i. 141; thickening of the skin on the soles of the, i. 118.
_Felis canadensis_, throat-ruff of, ii. 267.
_Felis pardalis_ and _F. mitis_, sexual differences in the colouring of, ii. 287.
FEMALE, behaviour of the, during courtship, i. 273.
FEMALE birds, differences of, ii. 193.
FEMALES, presence of rudimentary male organs in, i. 208; preference of, for certain males, i. 262; pursuit of, by males, i. 272; occurrence of secondary sexual characters in, i. 276; development of male characters by, i. 280.
FEMALES and males, comparative mortality of, while young, i. 264, 276; comparative numbers of, i. 261, 263.
FEMUR and tibia, proportions of, in the Aymara Indians, i. 119.
FERGUSON, Mr., on the courtship of fowls, ii. 118.
FERTILIZATION, phenomena of, in plants, i. 273; in the lower animals, i. 274.
FEVERS, immunity of Negroes and Mulattoes from, i. 243.
_Fiber zibethicus_, protective colouring of, ii. 298.
FIDELITY of savages to one another, i. 95; importance of, i. 162.
FIELD-SLAVES, difference of, from house-slaves, i. 246.
FIJIANS, burying their old and sick parents alive, i. 77; estimation of the beard among the, ii. 349; admiration of, for a broad occiput, ii. 352.
FIJI Islands, beards of the natives, ii. 322, 349; marriage-customs of the, ii. 373.
FILIAL affection, partly the result of natural selection, i. 81.
FILUM terminale, i. 30.
FINCH, racket-shaped feathers in the tail of a, ii. 73.
FINCHES, spring change of colour in, ii. 85; British, females of the, ii. 193.
FINGERS, partially coherent, in species of _Hylobates_, i. 140.
FINLAYSON, on the Cochin Chinese, ii. 345.
FIRE, use of, i. 137, 183, 234.
FISCHER, on the pugnacity of the male of _Lethrus cephalotes_, i. 376.
FISH, proportion of the sexes in, i. 307; eagerness of male, i. 272.
FISHES, kidneys of, represented by Corpora Wolffiana in the human embryo, i. 16; male, hatching ova in their mouths, i. 210; receptacles for ova possessed by, i. 254; relative size of the sexes in, ii. 7; freshwater, of the tropics, ii. 17; protective resemblances in, ii. 18; nest-building, ii. 19; spawning of, ii. 19; sounds produced by, ii. 23, 331; continued growth of, ii. 216.
_Flexor pollicis longus_, similar variation of, in man, i. 129.
FLINT tools, i. 183.
FLINTS, difficulty of chipping into form, i. 138.
FLORIDA, _Quiscalus major_ in, i. 307.
FLOUNDER, coloration of the, ii. 18.
FLOWER, W. H., on the abductor of the fifth metatarsal in apes, i. 128; on the position of the Seals, i. 190; on the throat-pouch of the male Bustard, ii. 58.
FLY-CATCHERS, colours and nidification of, ii. 170.
FŒTUS, human, woolly covering of the, i. 25; arrangement of the hair on, i. 193.
FOOD, influence of, upon stature, i. 115.
FOOT, prehensile, in the early progenitors of man, i. 206; prehensile power of the, retained in some savages, i. 142.
FORAMEN, supra-condyloid, exceptional occurrence of in the humerus of man, i. 28, 130; in the early progenitors of man, i. 206.
FORBES, D., on the Aymara Indians, i. 119; on local variation of colour in the Quechuas, i. 246; on the hairlessness of the Aymaras and Quechuas, ii. 322; on the long hair of the Aymaras and Quechuas, ii. 320, 348.
FOREL, F., on white young swans, ii. 211.
_Formica rufo_, size of the cerebral ganglia in, i. 145.
FOSSILS, absence of, connecting man with the apes, i. 201.
FOWL, occurrence of spurs in the female, i. 280; game, early pugnacity of, i. 295; Polish, early development of cranial peculiarities of, i. 295; variations in plumage of, ii. 74; examples of correlated development in the, ii. 130; domestic, breeds and sub-breeds of, ii. 178.
FOWLS, spangled Hamburgh, i. 281, 294; sexual peculiarities in, transmitted only to the same sex, i. 283; loss of secondary sexual characters by male, i. 284; inheritance of changes of plumage by, i. 281; Polish, origin of the crest in, i. 284; period of inheritance of characters by, i. 294; cuckoo-, i. 294; development of the comb in, i. 295; numerical proportion of the sexes in, i. 306; courtship of, ii. 117; mongrel, between a black Spanish cock and different hens, ii. 131; pencilled Hamburgh, difference of the sexes in, ii. 158; Spanish, sexual differences of the comb in, ii. 158; spurred, in both sexes, ii. 162.
FOX, W. D., on some half-tamed wild ducks becoming polygamous, and on polygamy in the guinea-fowl and canary-bird, i. 270; on the proportion of the sexes in cattle, i. 305; on the pugnacity of the peacock, ii. 46; on a nuptial assembly of magpies, ii. 102; on the finding of new mates by crows, ii. 104; on partridges living in triplets, ii. 107; on the pairing of a goose with a Chinese gander, ii. 114.
FOXES, wariness of young, in hunting districts, i. 50; black, ii. 294.
FRANCE, numerical proportion of male and female births in, i. 301.
FRANCESCO, B., on the Simian resemblances of man, i. 4.
FRASER, C., on the different colours of the sexes in a species of _Squilla_, i. 335.
_Fringilla cannabina_, ii. 86.
_Fringilla ciris_, age of mature plumage in, ii. 213.
_Fringilla cyanea_, age of mature plumage in, ii. 213.
_Fringilla leucophrys_, young of, ii. 217.
_Fringilla spinus_, ii. 115.
_Fringilla tristis_, change of colour in, in spring, ii. 85; young of, ii. 216.
FRINGILLIDÆ, resemblance of the females of distinct species of, ii. 192.
FROGS, ii. 25; male, temporary receptacles for ova possessed by, i. 254; ready to breed before the females, i. 260; vocal organs of, ii. 28.
FRONTAL bone, persistence of the suture in, i. 124.
FRUITS, poisonous, avoided by animals, i. 36.
FUEGIANS, i. 167, 181; mental capacity of the, i. 34; quasi-religious sentiments of the, i. 67; power of sight in the, i. 118; skill of, in stone-throwing, i. 138; resistance of the, to their severe climate, i. 156, 237; difference of stature among the, i. 115; mode of life of the, i. 246; resemblance of, in mental characters, to Europeans, i. 232; aversion of, to hair on the face, ii. 348; said to admire European women, ii. 351.
FULGORIDÆ, songs of the, i. 351.
FUR, whiteness of, in arctic animals, in winter, i. 282.
FUR-BEARING animals, acquired sagacity of, i. 50.
G.
_Gallicrex_, sexual difference in the colour of the irides in, ii. 128.
_Gallicrex cristatus_, red caruncle occurring in the male during the breeding-season, ii. 80.
GALLINACEÆ, frequency of polygamous habits and of sexual differences in the, i. 269; love-gestures of, ii. 68; decomposed feathers in, ii. 74; stripes of young, ii. 184; comparative sexual differences between the species of, ii. 192, 194; plumage of, ii. 195.
GALLINACEOUS birds, weapons of the male, ii. 44; racket-shaped feathers on the heads of, ii. 73.
_Gallinula chloropus_, pugnacity of male, ii. 40.
_Gallinula cristata_, pugnacity of the male, ii. 41.
_Galloperdix_, spurs of, ii. 46; development of spurs in the female, ii. 162.
_Gallophasis_, young of, ii. 190.
_Gallus bankiva_, ii. 158; neck-hackles of, ii. 84.
_Gallus Stanleyi_, pugnacity of the male, ii. 44.
GALLS, i. 152.
GALTON, Mr., on the struggle between the social and personal impulses, i. 104; on hereditary genius, i. 111; on the effects of natural selection on civilised nations, i. 168; on the sterility of sole daughters, i. 170; on the degree of fertility of people of genius, i. 171; on the early marriages of the poor, i. 173; on the ancient Greeks, i. 177; on the Middle Ages, i. 178; on the progress of the United States, i. 179; on South African notions of beauty, ii. 347.
_Gammarus_, use of the chelæ of, i. 331.
_Gammarus marinus_, i. 334.
GANNETS, white only when mature, ii. 228.
GANOIDEI, i. 204.
GANOID fishes, i. 212.
GAOUR, horns of the, ii. 247.
GAP between man and the apes, i. 200.
GAPER, sexes and young of, ii. 217.
GARDNER, on an example of rationality in a _Gelasimus_, i. 334.
_Garrulus glandarius_, ii. 104.
GÄRTNER, on sterility of hybrid plants, i. 223.
GASTEROPODA, i. 324; pulmoniferous, courtship of, i. 324.
_Gasterosteus_, i. 271; nidification of, ii. 20.
_Gasterosteus leiurus_, ii. 2, 14, 20.
_Gasterosteus trachurus_, ii. 2.
_Gastrophora_, wings of, brightly coloured beneath, i. 397.
GAUCHOS, want of humanity among the, i. 101.
GAUDRY, M., on a fossil monkey, i. 197.
_Gavia_, seasonal change of plumage in, ii. 228.
GEESE, clanging noise made by, ii. 51; pairing of different species of, ii. 114; Canada, selection of mates by, ii. 116.
GEGENBAUR, C., on the number of digits in the Ichthyopterygia, i. 125; on the hermaphroditism of the remote progenitors of the vertebrata, i. 207.
_Gelasimus_, use of the enlarged chela of the male, i. 331; pugnacity of males of, i. 333; proportions of the sexes in a species of, i. 315; rational actions of a, i. 334; difference of colour in the sexes of a species of, i. 336.
GEMMULES, sexual selection of, i. 285.
GENESIS, i. 318.
GENIUS, ii. 328; hereditary, i. 111.
GENIUS, fertility of men and women of, i. 171.
GEOFFROY-SAINT-HILAIRE, Isid., on the recognition of women by male quadrumana, i. 13; on the occurrence of a rudimentary tail in man, i. 29; on monstrosities, i. 113; on animal-like anomalies in the human structure, i. 125; on the correlation of monstrosities, i. 130; on the distribution of hair in man and monkeys, i. 149; on the caudal vertebræ of monkeys, i. 150; on correlated variability, i. 151; on the classification of man, i. 186; on the long hair on the heads of species of _Semnopithecus_, i. 192; on the hair in monkeys, i. 194; on the development of horns in female deer, ii. 244; and F. Cuvier, on the mandrill, ii. 293; on Hylobates, ii. 318, 320.
GEOGRAPHICAL distribution, as evidence of specific distinctions in man, i. 218.
GEOMETRÆ, brightly coloured beneath, i. 397.
_Geophagus_, frontal protuberance of male, ii. 13, 20; eggs hatched by the male, in the mouth or branchial cavity, ii. 200.
GEORGIA, change of colour in Germans settled in, i. 246.
_Geotrupes_, stridulation of, i. 380, 382.
GERBE, M., on the nest-building of _Crenilabrus massa_ and _C. melops_, ii. 19.
GERLAND, Dr., on the prevalence of infanticide, i. 94; ii. 344, 364; on the extinction of races, i. 237, 238.
GERVAIS, P., on the hairiness of the gorilla, i. 149; on the mandrill, ii. 293.
GESTURE-LANGUAGE, i. 232.
GHOST-MOTH, sexual difference of colour in the, i. 399, 402.
GIBB, Sir D., on differences of the voice in different races of men, ii. 330.
GIBBON, Hoolock, nose of, i. 192.
GIBBONS, voice of, ii. 276.
GIRAFFE, mute, except in the rutting season, ii. 274; its mode of using the horns, ii. 250.
GIRAUD-TEULON, on the cause of short sight, i. 118.
GLANDERS, communicable between man and the lower animals, i. 11.
GLANDS, odoriferous, in mammals, ii. 279, 281.
_Glareola_, double moult in, ii. 80.
_Glomeris limbata_, difference of colour in the sexes of, i. 340.
GLOWWORM, female, apterous, i. 255; luminosity of the, i. 345.
GNATS, dances of, i. 349.
GNU, sexual differences in the colour of the, ii. 289.
GOAT, male, wild, falling on his horns, ii. 249; male, odour emitted by, ii. 279; male, wild, crest of the, ii. 282; Berbura, mane, dewlap, &c., of the male, ii. 284; Kemas, sexual difference in the colour of the, ii. 289.
GOATS, sexual differences in the horns of, i. 283; horns of, i. 289, ii. 246; domestic, sexual differences of, late developed, i. 293; beards of, ii. 282; mode of fighting of, ii. 249, 250.
GOAT-SUCKER, Virginian, pairing of the, ii. 49.
GOBIES, nidification of, ii. 20.
GOD, want of the idea of, in some races of men, i. 65.
GODRON, M., on variability, i. 112; on difference of stature, i. 115; on the want of connexion between climate and the colour of the skin, i. 241; on the odour of the skin, i. 248; on the colour of infants, ii. 318.
GOLDFINCH, ii. 56, 85; proportion of the sexes in the, i. 307; sexual differences of the beak in the, ii. 39; courtship of the, ii. 95.
GOLDFINCH, North American, young of, ii. 216.
GOLDFISH, ii. 16.
_Gomphus_, proportions of the sexes in, i. 314; difference in the sexes of, i. 362.
_Gonepteryx Rhamni_, i. 393; sexual difference of colour in, i. 409.
GOODSIR, Prof., on the affinity of the lancelet to the ascidians, i. 205.
GOOSANDER, young of, ii. 189.
GOOSE, Antarctic, colours of the, ii. 228.
GOOSE, Canada, pairing with a Bernicle gander, ii. 114.
GOOSE, Chinese, knob on the beak of the, ii. 129.
GOOSE, Egyptian, ii. 46.
GOOSE, Sebastopol, plumage of, ii. 74.
GOOSE, Snow-, whiteness of the, ii. 228.
GOOSE, Spur-winged, ii. 46.
GORILLA, ii. 323; semi-erect attitude of the, i. 142; mastoid processes of the, i. 143; direction of the hair on the arms of the, i. 192; supposed evolution of the, i. 230; polygamy of the, i. 266, ii. 361, 362; voice of the, ii. 276; cranium of, ii. 318; fighting of male, ii. 324.
GOSSE, P. H., on the pugnacity of the male Humming-birds, ii. 40.
GOSSE, M., on the inheritance of artificial modifications of the skull, ii. 380.
GOULD, B. A., on variation in the length of the legs in man, i. 108; measurements of American soldiers, i. 114, 116; on the proportions of the body and capacity of the lungs in different races of men, i. 216; on the inferior vitality of mulattoes, i. 221.
GOULD, J., on the arrival of male snipes before the females, i. 260; on the numerical proportion of the sexes in birds, i. 306; on _Neomorpha_, ii. 39; on the species of _Eustephanus_, ii. 39; on the Australian Musk-duck, ii. 39; on the relative size of the sexes in _Biziura lobata_ and _Cincloramphus cruralis_, ii. 43; on _Lobivanellus lobatus_, ii. 48; on the habits of _Menura Alberti_, ii. 56; on the rarity of song in brilliant birds, ii. 58; on _Selasphorus platycercus_, ii. 65; on the Bower-birds, ii. 69, 102; on the ornamental plumage of the Humming-birds, ii. 78; on the moulting of the ptarmigan, ii. 83; on the display of plumage by the male Humming-birds, ii. 86; on the shyness of adorned male birds, ii. 97; on the decoration of the bowers of Bower-birds, ii. 112; on the decoration of their nests by Humming-birds, ii. 112; on variation in the genus _Cynanthus_, ii. 125; on the colour of the thighs in a male parakeet, ii. 126; on _Urosticte Benjamini_, ii. 151, 152; on the nidification of the Orioles, ii. 168; on obscurely-coloured birds building concealed nests, ii. 169; on Trogons and Kingfishers, ii. 173; on Australian parrots, ii. 174; on Australian pigeons, ii. 175; on the moulting of the ptarmigan, ii. 181; on the immature plumage of birds, ii. 186 _et seq._; on the Australian species of _Turnix_, ii. 201; on the young of _Aïthurus polytmus_, ii. 220; on the colours of the bills of Toucans, ii. 227; on the relative size of the sexes in the Marsupials of Australia, ii. 260; on the colours of the Marsupials, ii. 286.
GOUREAU, on the stridulation of _Mutilla europæa_, i. 366.
GOUT, sexually transmitted, i. 292.
GRABA, on the Pied Ravens of the Feroe Islands, ii. 126; on the Bridled Guillemot, ii. 127.
GRADATION of secondary sexual characters in birds, ii. 135.
GRALLATORES, absence of secondary sexual characters in, i. 270; double moult in some, ii. 81.
_Grallina_, nidification of, ii. 169.
GRASSHOPPERS, stridulation of the, i. 356.
GRATIOLET, Prof., on the anthropomorphous apes, i. 196; on the evolution of the anthropomorphous apes, i. 230.
GRAY, Asa, on the gradation of species among the Compositæ, i. 227.
GRAY, J. E., on the caudal vertebræ of monkeys, i. 150; on the presence of rudiments of horns in the female of _Cervulus moschatus_, ii. 245; on the horns of goats and sheep, ii. 246; on the beard of the Ibex, ii. 283; on the Berbura goat, ii. 285; on sexual differences in the coloration of Rodents, ii. 286; on the colours of the Elands, ii. 288; on the Sing-sing antelope, ii. 289; on the colours of goats, ii. 290; on the Hog-deer, ii. 303.
“GREATEST happiness principle,” i. 97, 98.
GREEKS, ancient, i. 177.
GREEN, A. H., on beavers fighting, ii. 239; on the voice of the beaver, ii. 277.
GREENFINCH, selected by a female canary, ii. 115.
GREG, W. R., on the early marriages of the poor, i. 173; on the Ancient Greeks, i. 178; on the effects of natural selection on civilised nations, i. 167.
GRENADIERS, Prussian, i. 112.
GREY, Sir G., on female infanticide in Australia, ii. 364.
GREYHOUNDS, numerical proportion of the sexes in, i. 263, 265; numerical proportion of male and female births in, i. 304.
GROUSE, red, monogamous, i. 269; pugnacity of young male, ii. 48; producing a sound by scraping their wings upon the ground, ii. 61; duration of courtship of, ii. 100; colours and nidification of, ii. 170.
GRUBE, Dr., on the occurrence of the supra-condyloid foramen in the humerus of man, i. 28.
_Grus americanus_, age of mature plumage in, ii. 213; breeding in immature plumage, ii. 214.
_Grus virgo_, trachea of, ii. 60.
_Gryllus campestris_, i. 353; pugnacity of male, i. 360.
_Gryllus domesticus_, i. 354.
_Grypus_, sexual differences in the beak in, ii. 39.
GUANACOES, battles of, ii. 239; canine teeth of, ii. 257.
GUANAS, strife for women among the, ii. 324; polyandry among the, ii. 366.
GUANCHE skeletons, occurrence of the supra-condyloid foramen in the humerus of, i. 29.
GUARANYS, proportion of men and women among, i. 302; colour of newborn children of the, ii. 318; beards of the, ii. 322.
GUENÉE, A., on the sexes of _Hyperythra_, i. 310.
GUILDING, L., on the stridulation of the _Locustidæ_, i. 352.
GUILLEMOT, variety of the, ii. 127.
GUINEA, sheep of, with males only horned, i. 289.
GUINEA-FOWL, monogamous, i. 269; occasional polygamy of the, i. 270; markings of the, ii. 134.
GUINEA-PIGS, inheritance of the effects of operations by, ii. 380.
GULL, instance of reasoning in a, ii. 108.
GULLS, seasonal change of plumage in, ii. 228; white, ii. 228.
GÜNTHER, Dr., on hermaphroditism in _Serranus_, i. 208; on male fishes hatching ova in their mouths, i. 210, ii. 20; on mistaking infertile female fishes for males, i. 308; on the prehensile organs of male Plagiostomous fishes, ii. 2; on the pugnacity of the male salmon and trout, ii. 3; on the relative size of the sexes in fishes, ii. 7; on sexual differences in fishes, ii. 8 _et seqq._; on the genus _Callionymus_, ii. 9; on a protective resemblance in a Pipe-fish, ii. 18; on the genus _Solenostoma_, ii. 22; on _Megalophrys montana_, ii. 26; on the coloration of frogs and toads, ii. 26; on sexual differences in the Ophidia, ii. 29; on differences of the sexes of lizards, ii. 32 _et seqq._
_Gynanisa Isis_, ocellated spots of, ii. 132.
GYPSIES, uniformity of, in various parts of the world, i. 242.
H.
HABITS, bad, facilitated by familiarity, i. 101; variability of the force of, i. 183.
HÄCKEL, E., on the origin of man, i. 4; on rudimentary characters, i. 17; on the canine teeth in man, i. 126; on death caused by inflammation of the vermiform appendage, i. 28; on the steps by which man became a biped, i. 142; on man as a member of the Catarrhine group, i. 199; on the position of the Lemuridæ, i. 202; on the genealogy of the Mammalia, i. 203; on the lancelet, i. 204; on the transparency of pelagic animals, i. 323; on the musical powers of women, ii. 337.
HAGEN, H., and Walsh, B. D., on American neuroptera, i. 314.
HAIR, development of, in man, i. 24; character of, supposed to be determined by light and heat, i. 116; distribution of, in man, i. 149, ii. 375; possibly removed for ornamental purposes, i. 149; arrangement and direction of, i. 192; of the early progenitors of man, i. 206; different texture of, in distinct races, i. 216; and skin, correlation of colour of, i. 248; development of, in mammals, ii. 281; management of, among different peoples, ii. 340; great length of, in some North American tribes, ii. 348; elongation of the, on the human head, ii. 380.
HAIRINESS, difference of, in the sexes, in man, ii. 320; variation of, in races of men, ii. 321.
HAIRS and excretory pores, numerical relation of, in sheep, i. 248.
HAIRY family, Siamese, ii. 378.
HAMADRYAS baboon, turning over stones, i. 75; mane of the male, ii. 267.
HAMILTON, C., on the cruelty of the Kafirs to animals, i. 94; on the engrossment of the women by the Kafir chiefs, ii. 369.
HAMMERING, difficulty of, i. 138.
HANCOCK, A., on the colours of the nudibranch mollusca, i. 326.
HANDS, larger at birth, in the children of labourers, i. 117; structure of, in the quadrumana, i. 139; and arms, freedom of, indirectly correlated with diminution of canines, i. 144.
HANDWRITING, inherited, i. 58.
HARCOURT, E. Vernon, on _Fringilla cannabina_, ii. 86.
_Harelda glacialis_, ii. 122.
HARE, protective colouring of the, ii. 298.
HARES, battles of male, ii. 239.
HARLAN, Dr., on the difference between field- and house-slaves, i. 246.
HARRIS, J. M., on the relation of complexion to climate, i. 245.
HARRIS, T. W., on the Katy-did locust, i. 353; on the stridulation of the grasshoppers, i. 357; on _Œcanthus nivalis_, i. 361; on the colouring of Lepidoptera, i. 396; on the colouring of _Saturnia Io_, i. 398.
HARRY-LONG-LEGS, pugnacity of male, i. 349.
HARTMAN, Dr., on the singing of _Cicada septendecim_, i. 351.
HAUGHTON, S., on a variation of the _flexor pollicis longus_ in man, i. 129.
HAWKS, feeding orphan nestling, ii. 107.
HAYES, Dr., on the diverging of sledge-dogs on thin ice, i. 46.
HEAD, altered position of, to suit the erect attitude of man, i. 143; hairiness of, in man, i. 149; processes of, in male beetles, i. 370; artificial alterations of the form of the, ii. 351.
HEARNE, on strife for women among the North American Indians, ii. 324; on the North American Indians’ notion of female beauty, ii. 344; repeated elopements of a North American woman, ii. 372.
HEART, in the human embryo, i. 16.
HEAT, supposed effects of, i. 116.
_Hectocotyle_, i. 325.
HEDGE-WARBLER, ii. 198; young of the, ii. 209.
HEEL, small projection of, in the Aymara Indians, i. 120.
HEGT, M., on the development of the spurs in peacocks, i. 290.
HELICONIDÆ, i. 387; mimickry of, by other butterflies, i. 411.
_Heliopathes_, stridulation peculiar to the male, i. 383.
_Heliothrix auriculata_, young of, ii. 188, 189.
_Helix pomatia_, example of individual attachment in, i. 325.
HELLINS, J., proportions of sexes of Lepidoptera reared by, i. 313.
HELMHOLTZ, on the vibration of the auditory hairs of crustacea, ii. 333.
HEMIPTERA, i. 349.
_Hemitragus_, beardless in both sexes, ii. 283.
HEPBURN, Mr., on the autumn song of the water-ouzel, ii. 54.
_Hepialus humuli_, sexual difference of colour in the, i. 399, 402.
HERBS, poisonous, avoided by animals, i. 36.
HERMAPHRODITISM of embryos, i. 207.
_Herodias bubulcus_, vernal moult of, ii. 84.
HERON, love-gestures of a, ii. 68.
HERON, Sir R., on the habits of peafowl, ii. 119, 120, 152.
HERONS, decomposed feathers in, ii. 74; breeding plumage of, ii. 82, 83; young of the, ii. 208; sometimes dimorphic, ii. 214; continued growth of crest and plumes in the males of some, ii. 216; change of colour in some, ii. 231.
_Hetærina_, difference in the sexes of, i. 362; proportion of the sexes in, i. 314.
_Heterocerus_, stridulation of, i. 379.
HEWITT, Mr. on a game-cock killing a kite, ii. 44; on the recognition of dogs and cats by ducks, ii. 110; on the pairing of a wild duck with a pintail drake, ii. 115; on the courtship of fowls, ii. 117; on the coupling of pheasants with common hens, ii. 122.
HINDOO, his horror of breaking his caste, i. 99, 103.
HINDOOS, local difference of stature among, i. 115; difference of, from Europeans, i. 240; colour of the beard in, ii. 319.
_Hipparchia Janira_, instability of the ocellated spots of, ii. 132.
_Hipparchiæ_, i. 387.
_Hippocampus_, development of, i. 210; marsupial receptacles of the male, ii. 21.
HIPPOPOTAMUS, nakedness of, i. 148.
HIPS, proportions of, in soldiers and sailors, i. 117.
HODGSON, S., on the sense of duty, i. 71.
HOFFBERG, on the horns of the reindeer, ii. 244; on sexual preferences shown by reindeer, ii. 273.
HOG, wart-, ii. 265; river-, ii. 266.
HOG-DEER, ii. 303.
HOLLAND, Sir H., on the effects of new diseases, i. 238.
HOMOLOGOUS structures, correlated variation of, i. 130.
HOMOPTERA, i. 350; stridulation of the, and orthoptera, discussed, i. 360.
HONDURAS, _Quiscalus major_ in, i. 307.
HONEY-BUZZARD of India, variation in the crest of, ii. 126.
HONEY-SUCKERS, moulting of the, ii. 83; Australian, nidification of, ii. 169.
HONOUR, law of, i. 99.
HOOKER, Jos., on the colour of the beard in man, ii. 319.
HOOLOCK GIBBON, nose of, i. 192.
HOOPOE, ii. 56; sounds produced by the male, ii. 62.
_Hoplopterus armatus_, wing-spurs of, ii. 48.
HORNBILL, African, inflation of the neck-wattle of the male during courtship, ii. 72.
HORNBILLS, sexual difference in the colour of the eyes in, ii. 129; nidification and incubation of, ii. 169.
HORNE, C., on the rejection of a brightly-coloured locust by lizards and birds, i. 361.
HORNS, of deer, ii. 243, 248, 259; and canine teeth, inverse development of, ii. 257; sexual differences of, in sheep and goats, i. 283; loss of, in female merino sheep, i. 284; development of, in deer, i. 288; development of, in antelopes, i. 289; from the head and thorax, in male beetles, i. 370.
HORSE, polygamous, i. 267; canine teeth of male, ii. 241; winter change of the, ii. 298; fossil, extinction of the, in South America, i. 239.
HORSES, dreaming, i. 46; rapid increase of, in South America, i. 135; diminution of canine teeth in, i. 144; of the Falkland Islands and Pampas, i. 236; numerical proportion of the sexes in, i. 263, 265; lighter in winter in Siberia, i. 282; sexual preferences in, ii. 272; pairing preferentially with those of the same colour, ii. 295; numerical proportion of male and female births in, i. 303; formerly striped, ii. 305.
HOTTENTOT women, peculiarities of, i. 225.
HOTTENTOTS, lice of, i. 220; readily become musicians, ii. 334; notions of female beauty of the, ii. 345; compression of nose by, ii. 352.
HOUSE-SLAVES, difference of, from field-slaves, i. 246.
HUBER, P., on ants playing together, i. 39; on memory in ants, i. 45; on the intercommunication of ants, i. 58; on the recognition of each other by ants after separation, i. 365.
HUC, on Chinese opinions of the appearance of Europeans, ii. 345.
HUMAN kingdom, i. 186.
HUMAN sacrifices, i. 68.
HUMANITY, unknown among some savages, i. 94; deficiency of, among savages, i. 101.
HUMBOLDT, A. von, on the rationality of mules, i. 48; on a parrot preserving the language of a lost tribe, i. 236; on the cosmetic arts of savages, ii. 339, 340; on the exaggeration of natural characters by man, ii. 351; on the red painting of American Indians, ii. 352.
HUME, D., on sympathetic feelings, i. 85.
HUMMING-BIRD, racket-shaped feathers in the tail of a, ii. 73; display of plumage by the male, ii. 86.
HUMMING-BIRDS, ornament their nests, i. 63, ii. 112; polygamous, i. 269; proportion of the sexes in, i. 307, ii. 221; sexual differences in, ii. 39, 40, 151; pugnacity of male, ii. 40; modified primaries of male, ii. 65; coloration of the sexes of, ii. 78; young of, ii. 220; nidification of the, ii. 168; colours of female, ii. 168.
HUMPHREYS, H. N., on the habits of the Stickleback, i. 271, ii. 2.
HUNGER, instinct of, i. 89.
HUNS, ancient, flattening of the nose by the, ii. 352.
HUNTER, J., on the number of species of man, i. 226; on secondary sexual characters, i. 253; on the general behaviour of female animals during courtship, i. 273; on the muscles of the larynx in song-birds, ii. 55; on the curled frontal hair of the Bull, ii. 282; on the rejection of an ass by a female zebra, ii. 295.
HUNTER, W. W., on the recent rapid increase of the Santali, i. 133; on the Santali, i. 241.
HUSSEY, Mr., on a partridge distinguishing persons, ii. 110.
HUTCHINSON, Col., example of reasoning in a retriever, i. 48.
HUTTON, Capt., on the male wild goat falling on his horns, ii. 249.
HUXLEY, T. H., on the structural agreement of man with the apes, i. 3; on the agreement of the brain in man with that of lower animals, i. 10; on the adult age of the Orang, i. 13; on the embryonic development of man, i. 14; on the origin of man, i. 4, 17; on variation in the skulls of the natives of Australia, i. 108; on the abductor of the fifth metatarsal in apes, i. 128; on the position of man, i. 191; on the sub-orders of primates, i. 195; on the Lemuridæ, i. 202; on the Dinosauria, i. 204; on the amphibian affinities of the Ichthyosaurians, i. 204; on variability of the skull in certain races of man, i. 226; on the races of man, i. 229.
HYBRID birds, production of, ii. 113.
HYDROPHOBIA communicable between man and the lower animals, i. 11.
_Hydroporus_, dimorphism of females of, i. 343.
_Hyelaphus porcinus_, ii. 303.
_Hygrogonus_, ii. 21.
_Hyla_, singing species of, ii. 27.
_Hylobates_, maternal affection in a, i. 40; absence of the thumb in, i. 140; upright progression of some species of, i. 143; direction of the hair on the arms of species of, i. 192; females of, less hairy below than males, ii. 320.
_Hylobates agilis_, i. 140; hair on the arms of, i. 193; musical voice of the, ii. 277; superciliary ridge of, ii. 318; voice of, ii. 332.
_Hylobates hoolock_, sexual difference of colour in, ii. 291.
_Hylobates lar_, i. 140; hair on the arms of, i. 193.
_Hylobates leuciscus_, i. 140.
_Hylobates syndactylus_, i. 140; laryngeal sac of, ii. 276.
HYMENOPTERA, i. 364; large size of the cerebral ganglia in, i. 145; classification of, i. 188; sexual differences in the wings of, i. 345; aculeate, relative size of the sexes of, i. 347.
HYMENOPTERON, parasitic, with a sedentary male, i. 272.
_Hyomoschus aquaticus_, ii. 304.
_Hyperythra_, proportion of the sexes in, i. 310.
_Hypogymna dispar_, sexual difference of colour in, i. 398.
_Hypopyra_, coloration of, i. 397.