INDEX 



-*- 



Abatus, 143. 

 Abdominalia, 345. 

 Abiogenesis,, 9. 

 Ablastica, 79. 

 Abranchia, 239. 

 Abranchiata, 299, 303. 

 Abyla, 98. 

 Ab}'ssal zone, 44. 

 Acanthin, 8, 13, 60. 

 Acanthobdella, 198. 

 Acanthobdellidse, 203. 

 Acantliobothrium, 171. 

 Acanthocephala, 187. 

 Acanthochiasminse, 63. 

 Acanthocystis, 59. 

 Acanthodesmiaceze, 62. 

 Acanthodoris, 305. 

 Acanthometra, 60. 

 Acanthometrid^, 60, 63. 

 Acanthospongia, 78. 

 AcaridtE, 372. 

 Acarina, 371, 

 Acarus, 365, 372. 

 Acephala, 160-255. 

 Accra, 311. 

 Accrida;, 160. 

 Acctabula, 385. 

 Achatina, 312. 

 Achatinella, 312. 

 Acherontia, 412. 

 Achcta, 404. 

 Achtheres, 348. 

 Achorutes, 402. 

 Aciculina, 311. 

 Aciculidse, 311. 

 Acineta, 69. 

 Acinetina, 69. 

 Acmostomum, 161. 

 Acoetes, 220. 



Acrseince, 412. 



Acraspeda, 102. 



Acrididaj, 389, 404. 



Acrocyst, 93. 



Acroloxus, 295. 



Acrophalli, 185. 



Acrosoma, 375. 



Actseonia, 293, 306. 



Acseonidse, 306. 



Actineria, 1 15. 



Actinia, 114. 



Actiniadse, 114. 



Actiniince, 114. 



Actinocephalus, 65. 



Actinodendron, 115. 



Actinomma, 63. 



Actinophryna, 58. 



Actinophrys, 56. 



Actinopsis, 1 14. 



Actinopyga, 148, 153. 



Actinosphajrium, 59. 



Actinotrocha, 192. 



Actinozoa, 109. 



Actinozoa, development of, in time, 



46. 

 Actinula, 90. 

 Aculeata, 419. 

 Acura, 304. 



Adambulacral pieces, 1 34. 

 Adamsia, 114. 

 Adductor muscles, 261. 

 Adelocodonic, 86. 

 Adelsberg cave, 356, 362. 

 Adenopleura, 364-6, 373. 

 Adeorbis, 307. 

 Adjustor ventralis, 250. 

 ^ga, 362. 

 ^gina, 95. 

 ^gineta, 90. 



