INDEX 
To names of Classes, Orders, Sub-Orders, and Genera; and to technical terms. 
Abdominal ganglion, 113 
Abralia, 339 
Acanthoceras, 336 
Acanthochiton, 53 
Acanthodoris, 177 
Acanthopleura, 54 
Acanthoteuthis, 337 
Acavus, 187 
Acephala, 205 
Acera, 169 
Achatina, 188 
Acicula, 152 
Acila, 255 
Aclis, 158 
Acmaea, 145 
Actaeon, 168 
Actaeonella, 168 
Actaeonia, 181 
Actaeonina, 168 
Actinoceras, 332 
Actinodesma, 261 
Aculifera, 40 
Adacna, 271 
Adacnarca, 258 
Addisonia, 122 
Adductores, 210 
Adelactaeon, 168 
Adelphoceras, 333 
Adeorbis, 153 
Adesmacea, 274 
Aegirus, 177 
Aegoceras, 335 
Aerope, 189 
Aesthetes, 50 
Aetheria, 268 
Agadina, 140 
Agaronia, 121, 165 
Aglossa, 158 
Agnatha, 188 
Agriolimax, 187 
Alaria, 155 
Alderia, 181 
Aldisa, 178 
Alexia, 184 
Allopagus, 266 
Alloposus, 343 
Allorisma, 276 
Amalia, 187 
Amaltheus, 335 
Amaura, 156 
Amberleya, 150 
Ambonychia, 262 
Amicula, 53 
Ammoniceras, 153 
Anmonites, 335 
Ammonitoidea, 333 
Amphibola, 184 
Amphibulimus, 188 
Amphimenia, 60 
Amphineura, 40 
Amphipeplea, 185 
Amphisphyra, 168 
Amplhitretus, 343 
Ampullaria, 152 
Amussium, 262 
Anadara, 258 
Anadenus, 187 
Anal glands, 8, 96, 200 
Anarcestes, 334 
Anatina, 275 
Anatinacea, 275 
Ancillaria, 165 
Ancistromesus, 145 
Ancistroteuthis, 339 
Ancula, 178 
Anculotus, 154 
Ancylodoris, 178 
Ancylus, 186 
Androgyna, 166 
Aneitea, 189 
Aneitella, 189 
Anisocardia, 264 
Anisomyaria, 211 
Anisopleura, 66 
Anodonta, 268 
Anomalodesmacea, 254 
Anomia, 257 
Anomiacea, 257 
347 
Anoplophora, 267 
Anostoma, 188 
Antalis, 204 
Anthracoptera, 262 
Anthracosia, 267 
Antipleura, 256 
Antispadix, 324 
Aplacophora, 51 
Aplexa, 186 
A plodon, 268 
Aplustrum, 169 
Aplysia, 171 
Aplysiella, 171 
Aplysiomorpha, 171 
Aptychus, 334 
Aptyxiella, 154 
Arca, 258 
Arcacea, 258 
Arcestes, 335 
Archidoris, 178 
Architeuthis, 338 
Arcicardium, 271 
Arcomya, 276 
Arconaia, 268 
Argina, 258 
Argonauta, 343 
Arietites, 335 
Ariolimax, 187 
Arion, 187 
Ariophanta, 186 
Arm, 289 
Arnaudia, 272 
Articulamentum, 42 
Asaplis, 273 
A scoceras, 333 
Aspergillum, 277 
Aspidobranchia, 144 
Assiminea, 153 
A starte, 264 
Asthenothaerus, 275 
Astralium, 150 
Asymmetry, 76, 111 
Atlanta, 163 
A topos, 189 
