CHAPTER XVIII

INTRODUCTION--DIVISION I. ECARDINES--EXTERNAL CHARACTERS--INTERNAL CHARACTERS--DIVISION II. TESTICARDINES--EXTERNAL CHARACTERS--INTERNAL CHARACTERS--SYNOPSIS OF FAMILIES--STRATIGRAPHICAL DISTRIBUTION--PHYLOGENY AND ONTOGENY 491

SCHEME OF THE CLASSIFICATION ADOPTED IN THIS BOOK

MOLLUSCA

Class Order Sub-order Section { OCTOPODA (p. 382). { { Phragmophora (p. 386). { =Dibranchiata= { { Sepiophora (p. 388). { { { { { DECAPODA { Chondrophora { _Myopsidae_ (p. 389). { { { { _Oigopsidae_ (p. 390). =CEPHALOPODA= { { { NAUTILOIDEA { Retrosiphonata (p. 393). { { { Prosiphonata (p. 395). { =Tetrabranchiata= { { { AMMONOIDEA { Prosiphonata (p. 397). { { { Prosiphonata (p. 397).

{ =Amphineura= { POLYPLACOPHORA (p. 400). { { APLACOPHORA (p. 404). { { { { Docoglossa (p. 405). { { DIOTOCARDIA { { _Zygobranchiata_ { { { Rhipidoglossa { (p. 406). { { { { _Azygobranchiata_ { =Prosobranchiata= { { { (p. 407). { { { { { Ptenoglossa (p. 411). { { { { _Platypoda_ (p. 411). { { { Taenioglossa { _Heteropoda_ (p. 420). { { MONOTOCARDIA { =GASTEROPODA= { { { Gymnoglossa (p. 422). { { { { { { Toxoglossa (p. 426). { { { { Bulloidea (p. 429). { { TECTIBRANCHIATA { Aplysioidea (p. 430). { { { Pleurobranchoidea (p. 431). { { { Siphonarioidea (p. 431). { { { =Opisthobranchiata= { ASCOGLOSSA (p. 431). { { { { NUDIBRANCHIATA { Cladohepatica (p. 432). { { { Holohepatica (p. 433). { { { { PTEROPODA { Thecosomata (p. 435). { { { Gymnosomata (p. 437). { { { { =Pulmonata= { BASOMMATOPHORA (p. 438). { { STYLOMMATOPHORA (p. 439).

=SCAPHOPODA= (p. 444).

Class Order Suborder { =Protobranchiata= (p. 447). { { ANOMIACEA (p. 448). { =Filibranchiata= { ARCACEA (p. 448). { { MYTILACEA (p. 448). { { =Pseudolamellibranchiata= (p. 449). { =PELECYPODA= { { SUBMYTILACEA (p. 451). { { TELLINACEA (p. 453). { { VENERACEA (p. 454). { =Eulamellibranchiata= { CARDIACEA (p. 454). { { MYACEA (p. 456). { { PHOLADACEA (p. 457). { { ANATINACEA (p. 458). { =Septibranchiata= (p. 459).

BRACHIOPODA

Order Family { { Lingulidae (pp. 487 and 503). { { Obolidae (p. 504). { ECARDINES { Discinidae (pp. 487 and 504). =Brachiopoda= { { Craniidae (pp. 487 and 504). { { Trimerellidae (p. 504). { { { Productidae (p. 504). { { Strophomenidae (p. 505). { { Koninckinidae (p. 505). { { Spiriferidae (p. 505). { { Atrypidae (p. 505). { TESTICARDINES { Rhynchonellidae (pp. 487 and 505). { { Terebratulidae (pp. 487 and 506). { { Argiopidae (p. 506). { { Stringocephalidae (p. 506). { { Thecidiidae (pp. 487 and 506).

LIST OF MAPS

THE GEOGRAPHICAL DISTRIBUTION OF THE LAND OPERCULATE MOLLUSCA _Frontispiece_

THE GEOGRAPHICAL DISTRIBUTION OF THE LAND MOLLUSCA OF THE EAST INDIAN ARCHIPELAGO _Between pp. 308 and 309_

THE RELATIONS OF THE LAND MOLLUSCA OF NEW GUINEA WITH THOSE OF NORTH AUSTRALIA _To face p. 322_

THE GEOGRAPHICAL DISTRIBUTION OF THE LAND MOLLUSCA OF THE WEST INDIES _Between pp. 344 and 345_

MOLLUSCS

BY

REV. A. H. COOKE, M.A. Fellow and Tutor of King’s College, Cambridge

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