INDEX. 



Abdominalia, 260. 

 Abiognesis, 38. 

 Abiological sciences, 9. 

 Acanthobdella, 189. 

 Acanthocepbala, 553, 577. 

 Acanthoteutbis, 465. 

 Acarina, 329. 

 Achetidae, 378. 

 Achtheres, 241. 

 Acineta mystacina, 94. 

 Acinetae, 89, 93, 94, 99-101. 

 Acrididae, 378. 

 Actinia, 53, 140, 141, 154. 



holsatica, 139. 



Actinidae, 140, 141, 145. 



Actinophrys, 83, 86, 93. 



Actinosphaerium Eicbbornii, 83, 85. 



Actinozoa, 55, 110, 137, 146, 119, 150. 



Actinula, 132. 



^Eginidae, 136. 



^Ethalium aepticum, 13. 



.Etiology, 16, 37. 



Agamogenesis, 31, 34, 383 



Aglaophenia (Plumularidae), 120. 



Air-breatbing Artbropoda, 320. 



Alaurina, 157. 



Albertia, 170. 



Alcippe lampas, 261. 



Alcyonium, 143. 



Alectoromorphae, 69. 



Algae, 14, 20, 82, 97. 



Alimentary apparatus, 56. 



Allantois, 67. 



Alternation of generations, 36, 67. 



Ambulacral vessels, 54. 



Ametabola, 361. 



Ammonitidae, 459. 



Ammotbea pycnogonoidcs, 332. 



Amnion, 67. 



Amoeba radiosa, 86. 



sphaerococcus, 86. 



Amoebae, 13, S6, 103. 

 Amouroucium proliferum, 526. 

 Amphibia, 58, 59, 64, 70, 86. 

 Ampbidiscus, 108. 



Amphidotus cordatus, 491. 

 Ampbioxus, 57, 59. 

 Amphipoda, 313. 

 Amphithoe, 311. 

 Ampullaria, 60. 

 Anatomy, 16, 17. 

 Anenterous invertebrates, 577. 

 Anguillula brevispinus, 545. 



scandens, 550. 



Animals, cbaracters, 44; morphology, 47; 



physiology, 54 ; natural orders, 562. 

 Anisonema, 90. 

 Annelida, 50, 51, 66, 164, 171, 193, 206, 207, 



212, 219, 416, 575, 5S0, 586. 

 Annuloid series, 580. 

 Annulose differentiation, 52. 

 Anodonta, 407, 408, 412, 416, 417. 

 Anomia, 411, 417. 

 Anomura, 293, 294. 

 Anthophysa, 90. 

 Antinophrys Eichhornii, 13. 

 Antipathida?, 145, 146. 

 Aphis, 36, 37, 3S0-384. 



pelargonii, 364. 



Aphroditidae, 210. 



Apoda, 260. 



Aporosa, 146, 147, 150, 153. 



Appendages, 20. 



Appendicular™, 53, 510-518, 576. 



flabellum, 511. 



Aprocta, 158. 



Aptychus, 459, 460. 



Apus, 220, 223, 226, 242-245. 



cancriformis, 243. 



glacialis, 245. 



Arachnida, 59, 221, 224, 320, 573. 



Araneina, 326. 



Area, 417. 



Arcella, 86. 



Arctisca, 334. 



Argonauta argo, 461, 462. 



Argulus, 241. 



" Aristotle's lantern," 492. 



Arthrogastra, 320. 



Arthropoda. 21, 32, 36. 52. 53, 57, 64, 66, 198, 



206, 219-225, 320, 573, 574, 580, 586. 

 Arthrozoic series, 5S0, 



