INDEX 



GENERA AND FAMILIES. 



The names of the Families are in Italics. 



PAGE 



Acliatina 251 



Aclis 167 



Acinaea 121 



Acme 259 



Actseon (Elysia) .... 228 



Actseonia 228 



Adeorbis 135 



^girus 224 



Akera 210 



Alderia .228 



Ampliispira 211 



AnatinidcB 44 



Ancida 225 



Ancylus 257 



Anodonta .88 



Anomia 109 



PAGB 



Antiopa 228 



Aplidium 4 



Aplysia 216 



Aplysiadce 216 



Aporrhais 159 



Area 97 



Arcadce 96 



Arion 233 



Artemis 66 



AscidiadcB 7 



Assiminea 149 



Astarte 68 



Auriculidce 258 



Avicida 94 



AmcuUdcs 94 



Azeka 251 



