ALPHABETICAL INDEX OP GENERA. 



Page. 



ACHATINA 47 



Achatinella 46 



Acmse 35 



Adamsiella 57 



Liberia 71 



Alasmodonta 71 



Alcadia 58 



Alexia 53 



Alycaeus 54 



Amphibola 51 



Amphidesma 63 



Ampullacera 51 



Ampullaria 28 



Anatina 60 



Ancillaria 10 



Ancylus 51 



Anodonta 71 



Anomia 75 



Anostoma 42 



Aplustrum 35 



Aplysia 36 



Area 73 



Argonauta 1 



Arinia 56 



Asaphis 62 



Aspergillum 59 



Assiminia 58 



Atys 35 



Auricula 53 



Avicula... 72 



BALEA 49 



Bankivia 33 



Barnea 59 



Bithynia 28 



Boysia 42 



Bticcinum 6 



Bulimus 43 



Bulk 35 



Bullsea 36 



Bullia 6 



OECUM 28 



Calyptraea 29 



Cancellaria 23 



Capsa 63 



Cardita 69 



Cardium 67 



Carinaria 2 



Carychium 53 



Cassidaria 13 



Cassiduk 53 



Page. 



Cassis 13 



Castalia 71 



Cataulus 56 



Cemoria 34 



Cerithidea 24 



Ceritbium 23 



Chama 67 



Chamostrea 61 



Chemnitzia 16 



Chenopus 20 



Chilina 50 



Chiton 35 



Chitonellus 35 



Choanopoma 56 



Circe , 65 



Clanculus 33 



Clausilia 49 



Clavagella 59 



Cleodora 2 



Columbella 12 



Concholepas 9 



Conns 16 



Corbis 68 



Corbula., 60 



Crania 75 



Crassatella 68 



Crassina 68 



Cremnobates 26 



Crenatula 72 



Crepidula 29 



Crucibnlum 29 



Cucullaea 73 



Cnltellus 60 



Cumingia 63 



Cyclas 66 



Cyclopborus. 55 



Cyclostomus 57 



Cyclotopsis 56 



Cyclotus 54 



Cylindrella 48 



Cyllene 6 



Cymbium , 11 



Cypraea 20 



Cypricardia 66 



Cyprina 66 



Cyrena 66 



Cyrtulus 4 



Cytberea 64 



DACTYT.INA 59 



Delphinula 32 



Dentaliura... .. 34 



