L.

Labrador, drift-timber of, 745. ----, rocks drifted by ice on coast of, 230.

Laccadive Islands, 782.

Lagoons, or salt lakes, in delta of Rhone, 259. ----, of coral islands, 780.

Lagullas current, 95.

Lagunes on coast of Adriatic, 256.

Lake Erie. _See_ Erie, Lake. ----, of Geneva. _See_ Geneva, Lake of. ----, Maeler, 524, 528. ----, Superior. _See_ Superior, Lake.

Lakes, filling up of 252. ----, formation of; in basin of Mississippi, 466, 269. ----, formed by earthquakes, 466, 481, 505. ----, crescent-shaped, in plain of Mississippi, 266. ----, Canadian, strata forming in, 768.

Lamarck, his definition of species, 567. ----, on transmutation of species, 567, 587, 696, 699. ----, on conversion of orang into man, 575. ----, on numbers of polyps, 706.

Lancashire, fossil canoes in, 759.

Lancerote, eruptions in, 436, 439.

Land, quantity of, in northern and southern hemispheres, 102, 109, 110. ----, upraised at successive periods, 118, 119. ----, proofs of existence of, at all periods, 188. ----, proportion of sea and, 124. ----, elevation of, how caused, 171, 453, 457, 459, 562.

Landslips, 319, 321, 485, 505. ----, imbedding of organic remains by, 732.

Languedoc, deposits on coast of, 260.

Laplace on change in the earth's axis, 32. ----, on mean depth of Atlantic and Pacific, 104. ----, on no contraction of globe, 129. ----, on mean density of the earth, 536.

Lapland, why milder than Greenland, 94. ----, migrations of animals in, 637.

Lateral pressure caused by landslips, 322. ----, pressure in Andes and Alps, 171.

Latham, Dr. R. G., on Natural History of Man, 609.

Lauder, Sir T. D., on floods in Scotland, 208, 686, 730, 748.

Lava excavated by rivers, 213. ----, effects of decomposition on, 385. ----, flowing of, under water, 383. ----, hydrostatic pressure of ascending, 552. ----, of Iceland and Central France, 426, 427. ----, comparative volume of ancient and modern, 161, 427. ----, pretended distinction between ancient and modern, 438. ----, mineral composition of, 449, 551. ----, rate of flowing, 378, 400.

Lazzaro Moro, _See_ Moro.

Lehman, treatise of, 1759, 40.

Leibnitz, theory of, 26.

Leidy, Dr., on Priscodelphinus, 145.

Lemings, migrations of, 637.

Lena, R., fossil bones on banks of, 78, 80.

Leonardo da Vinci, 19.

Lewes, human bones in tumulus near, 739. ----, estuary recently filled up near, 748, 768.

Liege, caves near, 737.

Light, influence of, on plants, 89.

Lightning, effect of, in Shetland Islands, 299.

Lignite, conversion of wood into, 759.

Lima destroyed by earthquake, 501. ----, elevated recent marine strata at, 502.

Lime, whence derived, 796.

Lincolnshire, inroads of sea on coast of, 304.

Lindley, Dr., on fossil plants of Melville Islands, 88. ----, on number of plants, 705. ----, on dispersion of plants, 620. ----, on fossil plants of coal, 88, 133. ----, cited, 133.

Linnaeus on filling up of Gulf of Bothnia, 521. ----, on subsidence of Scania, 530. ----, on constancy of species, 568. ----, on real existence of genera, 578. ----, on diffusion of plants, 624, 626. ----, on introduction of species, 665. ----, cited, 671.

Lionnesse tradition in Cornwall, 324.

Lippi on Herculaneum and Pompeii, 387.

Lipsius, 12.

Lisbon, earthquakes at, 358, 495.

Lister, first proposed geological maps, 26. ----, on fossil shells, 26.

Lloyd, Mr., on levels of Atlantic and Pacific, 294.

Loa, Mount, volcano of Sandwich Isles, 552.

Locusts, devastations of, 674. ----, bank formed in sea by, 675.

Loess of the Rhine, 185. ----, of the Mississippi valley, 265.

Loire, tertiary strata of the, 142.

London, artesian wells near, 234.

London basin, tertiary deposits of, 121. ----, clay, its fossils, 142, 144.

Lowestoff Ness described, 309. ----, cliffs undermined near, 309.

Lowland of Siberia, 78, 80, 83, 85.

Luckipour, on the Ganges, 276, 277. ----, new islands formed near, 276.

Luckput, subsidence near, 460.

Lund, Dr., on fossil quadrumana, 144.

Lybian sands, caravans overwhelmed by, 727.

Lyme Regis, waste of cliffs at, 321.

Lym-Fiord, breaches made by the sea in, 330.