TABLE OF CONTENTS. 



~ Page. 



1 



Introduction 2 



Systematic list 2 



Class Cephalopoda... "" 2 



Order Dibranchiata 2 



Family Argonautidae 2 



Genus Argonauta 3 



Family Spirulidae 3 



Genus Spirula 3 



Class Gastropoda '_"* 3 



Order Pteropoda 3 



Family Cavolinidae 3 



Genus Cavolina 3 



Genus Styliola 3 



Order Tectibranchiata 3 



Family Acteonidae 3 



Genus Acteon 3 



Genus Bullina 4 



Family Tornatinidae 4 



Genus Acteocina 4 



Genus Retusa g • 



Genus Volvula 5 



Family Scaphandridae v & 



Genus Cylichna 6 



Family Bullariidae 6 



Genus Bullaria 6 



Family Akeratidae 6 



Genus Haminea 7 



Family Ringiculidae 7 



Genus Ringicula g 



Family Hydatinidae g 



Genus Hydatina g 



Genus Cylindrobulia g 



Genus Volvatella 9 



Family Aplysiidae 9 



Genus Tetliys 9 



Family Philinidae 9 



Genus Philine 9 



Family Oxynoeidae 9 



Genus Oxynoe 10 



Order Pulmonata 10 



Family Auriculidae 10 



Genus Melampus 10 



Genus Microtralia 10 



Family Siphonariidae 10 



Genus Siphonaria 



v 



