CONTENTS 



CHAPTER VII 

 MOLLUSCA 



PAGE 



Systematic JReiiieio . 2 



Class I. Amphinetjka .... 2 



II. Gastropoda (Cephaloehoba) . . 3 



III. SCAPHOPODA . . . .13 



IV. Lamellieranchia (Pelecypoda, Bivalta, Aoephala, 



Aglossa) . .14 



V. Cephalopoda . 21 



I. Organisation of the Primitive Mollusc . . 26 



II. Review of the Outer Organisation characterising the 



Chief Groups of the Mollusoa . . .28 



A. PlAOOPHORA or PoLTPLACOPHORA (CHITONID.fi) . 29 



B. Aplacophora, Solbnogastres . . 29 



C. Gastropoda (Cephalophora) . 80 



D. Scaphopoda . 34 



E. Lamellieranohia . 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. Lamellieranohia . 49 



F. Cephalopoda 53 



IV. The Shell . 55 



A. Amphineura 68 



B. Gastropoda 58 



