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, ig6, 197, 389. 



Arctic Region, 52. 



Argentina, 357. 



AriStidae, iSg. 



Artemia, 229, 230, 466. 



Artemia salzna, 229 ; A, muelhausenii, 



229. 

 Arthropoda, 80, 81, 82, 83 172, 250, 253, 



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

 Articulations, of Arthropoda, 269 ; of 



Vertebrata, 275, 287. 

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



295i 296, 3i2t 313. 314. 3x5, 318, 320, 



325. 359t 360, 361, 520. 

 Arvicola, 349, 351. 

 Aryan, 159. 

 Asia, 73. 



Aspergillum, 265. 

 AstaQus, 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, igg. 

 Axolotl, 58. 



Bactrites, 187. 



Baculites, 189, 190. 



Bain, 494. 



Baird, S. F., 47. 



Baker, F. Dr., 469. 



Baleena tfzystzcetus, 353. 



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, 4S6. 



Bathyergus, 349. 



Batrachia, 87, 88, 8g, 91, 94, 95, g7, 98, 



108, 115, 116, 121, 172, 193, 195, 196, 

 218, 253, 363, 364, 365, 36S, 372, 388. 



Batrachia, line of the, 108; respira- 

 tion of, 93, 193 ; remains of, 110; B. 

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

 dela, 314, 367. 



Batrachidae, 107. 



Baur, G. 115, 366. 



Bear, 21. 



Beauchamp, 500. 



Beard, Dr. 85. 



Beaum^, 229, 



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



Beecher, C. E., lo, 176, 191. 



Bees, 463, 465- 



Belt, 500. 



Berthollet, 483, 



Bioplastology, 192. 



Blastocerus, ig6. 



Blastomeryx, 317. 



Blindness of cave animals, 241. 



Boa constrictor, 122. 



Bofiidea, 328. 



BoSf 144 ; B. tauruSy 22, 



Bouchardia, 178, i7g. 



Bovidae, 69, 209, 313, 315, 317. 



Brachiopoda, 191. 



Brachiopodus Mollusca, 58. 



Bradypus, 313. 



Bragg, C. L. 244. 



Brain, vertebrate— development of 



94- 



Branchinecta jTerox, 230 ; B, tnedia^ 

 230; B. sch^fferii, 230; B, spinosa^ 

 230. 



Branchiostoma, 86, 92. 



Branca, 188 



Brazil, 462. 



Breeding, 422, 437. 



Brehm, 301. 



Brevicipjtjdae, 70. 



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

 437. 



Bridger, 139. 



Brinton, 468. 



British America, 4g. 



Brooks, 86, 454, 459. 



Brown, A., 189, igo. 



Brown-S^quard, 430. 



Brunn, A. von, 403, 446, 



Buccinum, 260. 



