604 



INDEX. 



Ancyloceras, 310, 312, 314. 



Ancylus, 2v)6, 313. 



Andrias, 392. 



Androphores, 93. 



Angelina, 208. 



Anguillula, 171. 



Anguillulidce, 171. 



Anguis, 410. 



Animals and Plants, differences between, 

 7-11. 



Anisonema, 72. 



^nweZida, 177; characters of, 179; pseudo- 

 hseinal system of, 180 ; orders of, 181 ; 

 distribution of, in time, 188; phosphores- 

 cence of 72 ; urticating cells of, 76. 



Annulata (see Annelida). 



Annuloida, 14 ; characters and divisions 

 of, 135-136. 



Annulosa, 14,177; primary divisions of, 177. 



Anodon, 284. 



Anomodontia, 419. 



Anomura, 214, 217. 



Anoplotherium, 517, 564. 



Anoplura, 242. 



Anoura, 382 ; characters of, 387-391. 



Anserince, 417. 



Ant-eaters, 500, 501. 



Antelopes, 518, 520, 524. 



Antennae, of Lobster, 197, 216 ; of Arach- 

 nida, 222 ; of Myriapoda, 231 ; of In- 

 secta, 238. 



Antennules, of Lobster, 197, 216; of Li- 

 mulus, 210, 222. 



Anthracotherium, 5fi5. 



Anthropoid Apes, 556. 



Anthiw, 462. 



Antilopidce, 524. 



Antipatkidce, 116, 122, 123. 



Antipathes, 116. 



Antlia, 236, 247. 



Ants, 249; communities of, 250; slave- 

 making instincts of, 250 ; relations with 

 plant-lice, 251. 



Aphaniptera, 246. 



Aphides, 243 ; alleged parthenogenesis of, 

 30. 



Aphrodite, 186, 189. 



Apiocrinidce, 150, 156. 



Apes, 249. 



Aplacental Mammals, 484. 



Aplysia, 296. 



Aplysiadce, 292, 296." 



Apoda(Cirripedia),I9S, 204; (Amphibia), 

 384 .; (Fishes), 360, 362. 



Apodemata, 194. 



Apolemiadte, 94. 



Aporosa (Corals), 118, 133, 134. 



Aporrhais, 295. 



Appendicularia, 268, 270. 



Aptera, 239, 242. 



Apterygidce, 451, 452. 



Apteryx, 440, 443, 452. 



Aptornis, 470. 



Apus, 207, 220. 



Aquiferous system (see Water -vascular 



system). 

 Ar'achnactis, 112, 113. 



Arachnida, 190, 191 ; characters of, 221- 

 224 ; somite of, 221 ; organs of the 

 mouth of, 222 ; respiratory process of, 

 223 ; distribution of, in time, 230. 



Araince, 458. 



Araneida, 227; characters of, 228; webs 

 of, 229 ; reproductive process of, 229 ; 

 distribution of, in time, 230. 



Area, 284. 



Arcadoe, 283, 284. 



Arcella, 49. 



Arcellina, 50. 



Archceocidaris, 157. 



Archceocyathus, 64. 



Archceopteryx, 427, 442, 467, 469. 



Archencephala, 484. 



Archiulidce, 233. 



Archialus, 233. 



Arctisca, 225. 



Arctomys, 546. 



Ardea, 449. 



Ardeidce, 449. 



Arenicola, 187, 189. 



Argonauta, 256, 302 ; shell of, 303 ; re- 

 productive process of, 302 ; hectocotylns 

 of, 302. 



Argonautidce, 305. 



Aristotle's Lantern, 142. 



Armadillos, 483, 498, 500. 



Arms, of Star-fishes. 144; of Ophiuroidea, 

 147 ; of Crinoidea, 149 ; of Comatula, 

 150, 151 ; of Cystoidea, 152 ; of Brachio- 

 poda, 272; of Cuttle -fishes, 300; of 

 Nautilus, 308. 



Artemia, 207. 



Arthrogastra, 227. 



Arthropoda, 177; characters and divisions 

 of, J90. 



Articulata, 190. 



Artiodactyla, 513, 515. 



Asaphus, 208. 



Ascaris, 170. 



Ascidiadce, 270. 



Ascidioida (see Tunicata). 



Ascidians, solitary, social, and compound, 

 269, 270. 



Ascoceras, 310. 



Asinm, 515. 



Asiphonida(LameUibranchiata\ 283, 284. 



Aspergillum, 2S6. 



Asplanchna, 176. 



Astarte, 285. 



Asteriadce, 146. 



Asterinidce, 146. 



Asteroidea, 137, 138 ; general characters 

 of, 144, 146; families of, 146; distribu- 

 tion of, in space, 155 ; in time, 157. 



Astrceidce, 132, 134. 



Astrognnium, 157. 



Astropecten, 145, 157. 



Astropectinidce, 146. 



Astrophydice, 148. 



Astrophyton, 147. 



^l^^s, 555. 



Athorybiadce, 95. 



Athyris, 274. 



.4^anto, 296. 



^an^dee, 293, 296. 



Atolls, 129, 130, 132. 



Atrial system (Brachinpodd), 273. 



Atrium (Tunicata), 267. 



^Ittcftewa, 521. 



Auloporidce, 134. 



Aulosteges, 275. 



Aurelia, 105. 



Aurelia, 240. 



Auricula, 296. 



