INDEX TO GENERA. 



Paso. 



112 



112 



197 



16 



9 



10 



114 



Acanthina 



Aeanthinucella 



Acanthochitona 



Acar 



Acharax 



Acila 



Acirsa 



Aclis 119 



Acmaea 168 



Acteon 60 



Acteocina 61 



Admete 84 



Adula 22 



Aesopus 105 



Aforia 6S 



Agathotoma 83 



Aglaja 64 



Agriodesma 27 



Alaba 155 



Alabina 145 



Alectrion 102 



Aietes 151 



Alexandromenia 199 



Algamorda 153 



Algaroda 153 



Alia 103 



Aligcna 36 



Alipurpura 106 



Allogramma r 27 



Alvania 15S 



Amaura 135 



Amauropsis 166 



Amiantis 41 



Amphithalamus 158 



Amphissa 105 



Area 1(5 



Anachis 103 



Anaplocamus 160 



Page. 



Aptyxis 88 



Anatina 



AncistrolepiS-. 



Angulus 



Anisodonta 



Anomalosipho. 



Anomia 



Antigona 



Antiplanes 



51 

 92 

 45 

 38 

 95 

 21 

 41 

 71 



Aquilonaria 



Area 



Archivesica 



Arcopagia 



Arctonchis 



Arene 



Argobuccinum 



Asperoscala 



Astarte — 



Asthenothaerus 



Astraea 



Astyris 



Atlanta ' 138 



Atrimitra 86 



Atrina 17 



Atys 62 



Avlacofusus 93 



Austrotroplwn 109 



Axinopsis 34 



Axinulus 34 



155 



16 



40 



45 



67 



173 



141 



114 



29 



25 



172 



104 



Bankia 



Barbatia 



Barleeia 



Barnca 



Bartschella 



Basiliochiton- 



Bathyarca 



Beringiusl 



Bemardina 



Bcsla 



Bit Hum 



Bivonia 



Boetica 



Boreomelori-- 



Boreoscala 



Bornia 



Borsonella 



Botula 



Bnirhydontes 



Brocktonia 



Buccinum 



Bufonaria 



Bulb us 



Bullaria 



Bullinella 



Bursa 



56 



16 



156 



55 



127 



189 



16 



90 



30 



128 



145 



150 



154 



86 



114 



38 



72 



22 



22 



62 



98 



141 



166 



63 



63 



141 



203 



