INDEX TO GENERA. 



365 



i:^rDEX TO GENERA. 



Abies 107 



Abra 138 



Acara 255 



Accipiter 27 



Acer 101 



Achelons 120 



Achillea 116 



Achrochordus 202 



Actsea 239 



Actodromas 30 



Aciis 144 



^cidiiim 296 



^gialitis 28 



Agalychnis 205 



AgelfBus 24 



Agrostis 116 



Aix 36 



Alligator 48 



Allorisma 70, 167 



Alpheus 242 



Alj'ssum Ill 



Amblyopsis 297 



Ambouychia 319 



Ambrosia 110 



Amia 105 



Amiva 216, 218, 220, 221, 222 



Ammodromus 22 



Amphidesma '. 128, 138 



Anacyrtus • 266 



Analis 205 



Anapbthalmus 297 



Anas 36 



Aucistrodon 48, 205, 206, 209 



Anchitherium 118, 199 



Anicuhis 240 



Anodonta 188 



Anolis 200, 213, 218, 220 



Anomia 131 



Anosteira 103, 114 



Anostomus 258 



Anser 98 



Anthus 19 



Apbyocharax 260, 291 



Aplysia 140 



Aralia 106 



1872.] 



Area 129, 133 



Archgescaris 335 



Arcnseus 121 



Arctomys 230 



Ardea 33 



Asphidium 53 



Astarte 134 



Astcrias 148 



Atelopus 205, 222 



Aulastomum 306 



Avicula 133 



Aviciilopecten 60, 101, 178 



Aythya 37 



Baena 228 



Balaena 13 



Balauus 125 



Bascanion 49 



Bellerophou 77 



Bernicla 36 



Bittium 143 



Botanriis 34 



Bothriechis 204, 206, 207 



Botliriocephalus 306 



Bothriopsis 206, 208 



Bothrops 204 



Bonvardia 53 



Bracliyotus 27 



Brancbiostoma 129 



Brocbis 112, 277, 291 



Brycon 261 



Bucepbala 37 



Bufo 205, 216, 219 



Bulla 140 



Busycon 129, 144 



Butorides 33 



Cacabocrinns 59 



Calidris 31 



Callicbtbys 275, 277 



Callinectes... 120 



Callopbysus 293 



Caloptenus 149 



Camilia 200 



Campeloma 181 



