CONTENTS. 



Pago 



tunicata 1 



conchifera 28 



Brachiopoda 207 



Gasteropoda 212 



Opisthobranchiata 212 



Prosobranchiata 258 



pulm0ni7era 392 



Pteropoda 503 



Cephalapoda 508 



Index 519 



/ 7 s^ 33 



