534 PRIMARY FACTORS OF ORGANIC EVOLUTION. 



Appendicularidae, 87. 



Archaesthetism, 505, 513. 



Archean beds, 83. 



Archeopteryx, 124. 



Archipterygium, 91. 



Archosauria, 114. 



Arcifera, 64, 65, 70, 71, 196, 197, 389. 



Arctic Region, 52. 



Argentina, 357. 



Arietidae, 189. 



Artemia, 229, 230, 466. 



Artemia salina, 229 ; A. muelhauscnii, 



229. 

 Arthropoda, 80, 81, 82, 83 172, 25c, 253, 



268, 269, 368, 369, 389, 391, 404. 

 Articulations, of Arthropoda, C69 ; of 



Vertebrata, 275, 287. 

 Artiodactyla, 69, 132, 133, 150, 195, 248, 



295. 296, 312, 313, 314, 315. 3i8, 320, 



325. 359. 36o, 361, 520. 

 Arvicola, 349, 351. 

 Aryan, 159. 

 Asia, 73. 



Aspergillum, 265. 

 Astacus, hand of, 274. 

 Atrophy, of incisor teeth, 356; of the 



ulna and fibula, 355. 

 Australia, 72. 

 Australians, 163, 166. 

 Austroriparian, 29. 

 Avian line, 123. 

 Axis, 196, 199. 

 Axolotl, 58. 



Bactrites, 187. 



Baculites, 189, 190. 



Bain, 494. 



Baird, S. F., 47. 



Baker, F. Dr., 4fg. 



Balcpna mysticetus, 3"53. 



Ball, W. P., 461, 465, 466. 



Barber, M. E., 231, 234. 



Barrande, 185. 



Barrandeoceras, 413. 



Batavia, 168. 



Bather, 192. 



Bathmic energy, 480. 



Bathmism, 449, 479, 484. 



Bathmogenesis, 484, 486. 



Bathyergus, 349. 



Batrachia, 87, 88, 89, 91, 94, 95, 97, 98, 



108, 115, 1:6, 121, 172, 193, 195, 196, 

 218, 253, 363, 364, 365, 368, 372, 388. 



Batrachia, line of the, 108; respira- 

 tion of, 93, 193 ; remains of, no; />. 

 salcntia, 8, 63, 69, 70, 314, 389 ; B. uro- 

 dela, 314. 367. 



Batrachidae, 107. 



Baur, G. 115, 366. 



Bear, 21. 



Beauchamp. 500. 



Beard, Dr. 5. 



Beaume, 129. 



Beddard, F. E., 238, 240, 292. 



Beecher, C. E., 10, 176, 191. 



Bees, 4G3, 465. 



Belt, 500. 



Berthollet, 483. 



Bioplastology, 192. 



Blastocerus, 196. 



Blastomeryx, 317. 



Blindness of cave animals, 241. 



Boa constrictor, 122. 



Booidea, 328. 



Bos, 144 ; B. taunts, 22. 



Bouchardia, 178, 179. 



Bovidae, 69, 209, 313, 315- 3 1 ?- 



Brachiopoda, 191. 



Brachiopodus Mollusca, 58. 



Bradypus, 313. 



Bragg, C. L. 244. 



Brain, vertebrate development of 

 94. 



Branchi7iecta fci-ox, 230; B. media, 

 230; B. schcejferii, 230; B. spinosa, 

 230. 



Branchiostoma, 86, 92. 



Branco, i8 



Brazil, 462. 



Breeding, 422, 437. 



Brehm, 301. 



Brevicipitidae, 70. 



Brewer, W. H., 422, 426, 430, 431, 435, 



437- 

 Bridger, 139. 

 Brinton, 468. 

 British America, 49. 

 Brooks, 86, 454, 459. 

 Brown, A., 189, 190. 

 Brown-Sequard, 430. 

 Brunn, A. von, 403, 446. 

 Buccinum, 260. 



