ALPHABETICAL LIST OF GENERA MENTIONED IN 

 THIS GUIDE. 



(Synonyms are in italics.) 



Abyla, in. 

 Acanthia, 423. 

 Acanthosphoera, 41. 

 Acaulis, 99, 100. 

 Acervularia, 135. 

 Achorutes, 395. 

 Acmaea, 215. 

 Acronycta, 463. 

 Acrosoma, 369, 373. 

 Actias, 468. 

 Actinocrinus, 156, 157. 

 Actinometra, 160. 

 Actinophrys, 39,41. 

 Actinosphaerium, 39. 

 Actissa, 41-44. 

 Adamsia, 130. 

 Adeona, 288. 

 Adeonellopsis, 288. 

 Adranes, 435. 

 Aeginopsis, 96, 98, 105. 

 Aeolis, 234. 

 Aeschna, 401. 

 Agalena, 369,370. 

 Agalma, 1 10. 

 Agaricia, 138. 

 Aglacrinus, 161. 

 Aglaophenia, 92. 

 Aglaura, 98, 99. 

 Agrion, 401. 

 Alaurina, 319. 

 Alaus, 440. 

 Alcvonium, 119. 

 Alp'heus, 343. 

 Ammolynthus, 85. 

 Ammonites, 253. 

 Ammonites, 252, 253. 

 Ammosolenia, 85. 



Ammothea, 120. 

 Amoeba, 21-28, 31, 46. 

 Amphidetus, 189. 

 Amphitrite, 300. 

 Amphizoa, 434. 

 Ampularia, 230. 

 Amygdalocystis, 147. 

 Anabolia, 451. 

 Anasa, 420, 422. 

 Anatina, 198, 199. 

 Ancylus, 230. 

 Anemonia, 130. 

 A ngiosto m urn, 313. 

 Anisopteryx, 462. 

 Anodonta, 209, 210. 

 Anomia, 205. 

 Anopheles, 489. 

 Antedon, 158-160. 

 Anthea, 130. 

 Anthelia, 118. 

 Anthonomus, 445. 

 Anthophora, 442. 

 Anthrenus, 439. 

 Antillia, 136, 137. 

 Antipathes, 126, 127. 

 Anurida, 390 

 Aphrodite, 294. 

 Aphis, 426. 

 Apiocrinus, 157. 

 Apis, 482, 485. 

 Aplvsia, 232, 233. 

 Aplysilla, 86. 

 Apolemia, in. 

 Apus, 329, 330. 

 Arbacia, 179. 

 Area, 202. 

 Archerina, 14, 17. 



