CONTENTS 



CHAPTER VII 

 MOLLUSCA 



PAGE 



Systematic Review ........ 2 



Class I. AMPHINEURA ....... 2 



II. GASTROPODA (CEPHALOPHORA) ..... 3 



III. SCAPHOPODA ....... 13 



IV. LAMELLIBRANCHIA (PELECYPODA, BIVALVA, ACEPHALA, 



AGLOSSA) ....... 14 



V. CEPHALOPODA ..... .21 



I. ORGANISATION OF THE PRIMITIVE MOLLUSC ... 26 



II. REVIEW OF THE OUTER ORGANISATION CHARACTERISING THE 



CHIEF GROUPS OF THE MOLLUSCA .... 28 



A. PLACOPHORA OR POLYPLACOPHORA (CHITONID^) ... 29 



B. APLACOPHORA, SOLENOGASTRES . . 29 



C. GASTROPODA (CEPHALOPHORA) ..... 30 



D. SCAPHOPODA ....... 34 



E. LAMELLIBRANCHIA ....... 34 



F. CEPHALOPODA ....... 36 



III. THE INTEGUMENT, THE MANTLE, AND THE VISCERAL DOME . 39 



A. PLACOPHORA ....... 39 



B. SOLENOGASTRES ....... 41 



C. GASTROPODA . .... 42 



D. SCAPHOPODA . .... 49 



E. LAMELLIBRANCHIA ....... 49 



F. CEPHALOPODA . ..... 53 



IV. THE SHELL ... .55 



A. AMPHINEURA ....... 58 



B. GASTROPODA 58 



