INDEX. 



685 



Ampullaria, 332, 340. 



Anacanthini, 409. 



Anallantoidea, 383. 



Analogy, 17. 



Anamniota, 383. 



Ananchytidce, 163. 



Anarthrnpoda, 155, 203. 



./Inas, 506. 



Anatidce, 506. 



^Inatfna, 328. 



Anatinidce, 328. 



Anchithcrium, 585. 644. 



Ancyloceras, 356, o57, 3o8. 



.XncyZws, 341. 



-4ndnas, 437, 443. 



Androphores, 108. 



Angelina, 238. 



Anauillula. 195, 197. 



Anguillulidoe. 197. 



^4n0tm, 461. 463. 



Animals and Plants, differences between, 

 8-13. 



-Am'sonema, 83. 



Annelida, 203 ; characters of, 205 ; pseu- 

 dohsemal system of, 206; orders of. '2 7; 

 distribution of, in time, 215 ; phospho- 

 rescence of, 83 ; 'urticating cells of, 87. 



Annulata (see Annel-ida). 



Annuloida, 17 ; characters and divisions 

 of, 154. 



Annulosa, 17 ; characters and divisions 

 ' of, 203. 



Anodon, 327. 



Ancema, 619. 



Anomodontia, 475. 



Anomura, 249. 



Anoplotherida, 587. 



Anoplotherium, 587, 644. 



Anoplura, 277. 



-Anowra, 432; characters of, 438; develop- 

 ment of, 440 ; families of, 441. 



Anser, 506. 



Anserince, 506. 



Ant-eaters, 539, 568, 569. 



Antelopes, 591, 596, 646. 



Antennae of Lobster, 224, 947 ; of Rhizo- 

 cephala. 228 ; of Cirriptdes, 2z9, 230; 

 of Cladocera, 236 ; of JTiphosura, 240 ; 

 of Arachnida, 256 ; of Myriapoda, 

 265; of Pauropus, 267; of Insecta, 

 273. 



Antennules, of Lobster, 224 ; of Limulus, 

 240. 



Anthracotherium, 615. 



Anthropoid Apes, 635. 



Anthropoides, 509. 



Anthus, 526. 



Antilocapra, 595, 597. 



Antilopidce, 696. 



AntipathidLg, 133, 141. 



Antipathes, 133, 151. 



Autlia, 285. 



Ants, 281; communities of, 29; slave- 

 making instincts of, M. ; relations with 



plant-lice, ib. 



Antrostomus, 528. 



Apes, 635. 



A phanapteryx, 519. 



Aphaniptera, 2J-3. 



Aphides, 5i78 ; alleged parthenogenesis of, 

 33. 



Aphrodite, 213, 215. 



e, 174. 



s, 181. 

 Apis, 288. 



Aplacental Mammals, 550. 

 Aplysia, 341. 

 ^Ipfyst'ad*, 36, 341. 

 Apoda (Cirripedia). 933; (Amphibia, 



434 ; (Fishes), 408, 410. 

 Apodemata, 2'22. 

 Apolemiad^e, 109. 

 ^porosa (Corals), 135, 151, 152. 

 Aporrhais, 339. 

 Appendicularia, 309, 311. 

 Aptenodytes, 5u3. 

 ^tpfera, 274, 277. 

 ApterygidcE, 512 513. 

 Apteryx,5Il, 512, 513. 

 Aptornis, 535. 

 ^4pMS, 237, 353 

 Aquiferous system (see Water-vascular 



system). 



Arachnactis, 130. 

 Arachnida, 217. 218 ; characters of. 2'4; 



somite of, 255 ; organs of the mouth of, 



ib. ; respiratory process of, 257 ; dis- 



tribution in time, 264. 

 Araina, 521. 

 Araneida, 261 ; characters of. 262 ; webs 



of, 263 ; reproductive process of, ib. ; 



distribution of, in time, 264. 

 Area, 327. 

 Arcadce, 326, 327. 

 Arcella, 57. 

 ArcelUna, 58. 

 Archixocidaris, 163, 182. 

 Archceocyathus, 75. 

 Archaopteryx, 484, 499, 501, 5C2, 5S5. 

 Archencephala 55 1. 

 Ardiiulidce, 267. 



Arciictis, 610. 

 Arctisca, v59 

 s, 622. 



Jlrdezdre, 510. 



Arenicola, 215, 216. 



Aryonauta, 344, 348, 361 ; shell of. 340 ; 



reproductive process of. 347 ; nectocotylus 



of, 348, 351. 

 Argonautidce, 351, 357. 

 Aristotle's Lantern, 161. 

 Armadillos, 538, 539, 549, 552, 567. 

 Arms, of Star-fishes, 164; Ophiurnidca, 



16S ; of Crinoidea, 170 ; of Comatula, 



175 ; of Cystoidea, 176 ; of Brachiopoda, 



314 ; of Cuttle-fishes, 344 ; of JSfautdu*. 



353, 354. 

 Artemia, 237. 

 Arthrogastra, 261. 

 Arthropoda, 203 ; characters and divisions 



of, 217. 



Articulate 217. 

 Artiodactyla, 682, 585, 586. 

 Arvicola, 621. 

 Asaphus, 239. 

 ^4scaris, 195, 197. 

 Ascidiadce, 311. 

 Ascidioida (see Tunicata\ 

 Ascidians, solitary, social, and compound 



310, 811. 

 Ascoceras, 356. 

 245. 



