INDKX 



699 



Ara, 416, 429 



Arachnoid membrane, 103 



Arbor vitse, of Rabbit, 472 



Arboreal fauna, 637 



Archaeoceti, 605 



Archceohydrax, 607 



Archceopteryx lithoyraphica, 410, 418, 



419, 443, 444, 445, 640 

 Archceopteryx siemtnni, 420 

 Archaeornithes, 410*,' 418 

 Archeiiteron, 290 

 Archipallium, 579* 

 Archipterygiuni, 168*, 257 

 Arcifera, 294* 

 Arctomys marmot, 638 

 Ardea, 415, 422, 423 

 Area opaca, 363, 437 

 Area pellucida, 863, 437 

 Area vasculosa, 440 

 Argeritea, 214* 

 Aristotle, 668 

 Armadillos, 479, 490, 498, 499, 524, 525, 



526, 528, 530, 531, 564, 598, 604 

 Arteries, 92 See Vascular system 

 Arthrodira, 260 

 Articular, 80, 81* See Skull 

 Artiodactyla, 482*, 501, 536, 538, 541, 



543, 544, 564, 576 

 Arvicola, 594 



Arytenoids, of Lizard, 328 : Reptilia, 

 357 : Pigeon, 397 : Rabbit, 466 



ASCIDIA, 14: Body- wall and Atrial 

 cavity, 15, 16: Pharynx, 16, 17, 18, 

 19 : Enteric canal, 19 : Blood system, 

 18. 19 : Nervous system, 20, 21 : Neural 

 gland, 21 : Excretory system, 21 : 

 Reproductive system, 21 : Sj'stematic 

 position, 24 : Development, 32 



Ascidiacea, 23* 



Ascidiae compositae, 23*, 26 



Ascidiae simplices, 23*, 25 



Ascidia mammillata, 37 



Ascidians, 14 



Ascidiidce, 24 



Aspredo, 241 



Asses, 482, 599 



Astacopsis, 622 



Astacus, 621 



Asteriscus, 214*, 215 



Astragalo-scaphoid, 355 



Astragalus, 274, 458 See Limb-skeleton 



Astroscopus, 233 



A teles, 487 



Athecata, 371 



Atlas, 316* 



Atrial canals, of Appendicularia, 24 



Atrial cavity of Ascidia, 15, 18 



Atrial siphon, 15, 18 



Atrial lobes, of Doliolum, 27 



Atriopore, of Amphioxus, 46, 45, 49 



Atrium, of Ascidia, 15, 36 : Amphioxus, 

 49 



Auditory capsules, of Craniata, 75* 



Auditory nerve, 104, 105 See Brain 



Auditory organ See Ear 



Auditory ossicles, 455 See Ear 



Auditory region, of Craniata, 76* 



Augustine, 675 



Auks, 416, 436, 443, 444 



Autostylic, 78*, 190 



Auricle, 90 See Heart 



Auricular appendix, 463 



Australian region, 631 



Aves, 66, 313, 378 : Example, 378 : 

 Distinctive characters and classifica- 

 tion, 408 : General organisation, 417 : 

 Archseorriithes, 418 : External char- 

 acters of Neornithes, 420 : Pterylosis, 

 422 : Skeleton, 424 : Myology, 433 : 

 Digestive organs, 433 : Respiratory 

 and vocal organs, 434 : Circulatory 

 organs, 434 : Nervous system and 

 sense organs, 434 : Urinogenital 

 organs, 435 : Development, 435: Dis- 

 tribution, 442 : Ethology, 443 : Phyto- 

 geny, 443 



Avocet, 421 



Axis, basi-cranial, 513* 



Axolotl, 293, 311 



Aye-Ayes, 486 



Axis, 316 



Azygos vein of Rabbit, 464 



Azygos veins of Urodela, 306, 307 



B 



BABOONS, 487, 514, 554, 556 



Baer, K. E., von, 680 



Balcena, 480 



Balcenidce, 480 



Balcenoptcra muscidus. 532 



Balcc.noptera rostrata, 567, 568 



Balanoglossus, 2, 43 : External characters, 

 2, 3, 4 : Ccelome, 3 : Digestive organs, 

 5 : Notochord or cesophageal diverti- 

 culum, 4, 6 : Blood-vascular system, 4, 

 6: Nervous system, 4, 5,7: Repro- 

 ductive system, 7 : Development, 7, 8, 

 9 : Metamorphosis, 8, 9 



Baleen, 480*, 568* 



Baleen whales, 480 



Balfour, F. M., 688 



Banded ant-eater, 494 



Bandicoots, 478, 494, 524, 562, 597 



Banks, Sir J., 676 



Barbel, 146 



Barbels, in Teleostomi, 225 



Barbs, of feather, 382* 



Barbules, of feather, 382* 



Barriers, 626 



Barry, Martin, 680 



Basale, 232 



Basalia, of Craniata, 82* 



