826 



Subject Index 



Baboon, 2, 770, 771 

 Backbone (see Vertebral column) 

 Bactrian, 757 

 Balaena, 765 



australis, 766 

 Balaenoptera, 765 

 Balanoglossus, 393, 394, 395, 396 

 Baleen, 19, 765 



whale, 767 

 Bandicoot, 294, 732, 733 

 Barbs, 505, 506, 509 

 Barbules, 505-507, 509 

 Bartholin, glands of, 664 

 Basal plate, 47 

 Basement membrane, 305 

 Basibranchial, 120 

 Basihyal, 118, 607 



Basilar membrane (membrana basilaris), 

 690, 698 



fibers of, 692, 698 

 Basilaris papilla, 477 

 Basioccipital, 112, 124 

 Basiphenoid, 124, 127 

 Basophils, 329 

 Bat(s), 229, 370, 568, 571, 738, 739 



fruit, 739 

 Batfish, 229 



Batrachoseps attenuatus, 454 

 Bdellostoma, 413, 414, 415 

 Beak, 518 



Beaked whale, 764, 765 

 Bears, 747 



Beaver (s), 663, 665, 740 

 Bee-eaters, 551 

 Biceps, 92, 95 

 Bicuspid, 53 



valve, 622 

 Bile, 34, 35 



capillaries, 31 



duct, 14, 31, 32, 276 

 BUI, 518 



Binocular vision, 605 

 Binomial nomenclature, 340, 341 

 Biochemistry, 353 

 Biogenesis, law of, 349 

 Biometry, 352, 353 

 Biophysics, 353 

 Bipolar cells, 316, 318 



Birds (Aves), 13, 14, 16, 22, 227, 289, 293, 

 409, 410, 503-558, 630 



adaptations of, 556-558 



air-spaces in, 522, 523, 525 



aquatic, 556 



behavior of, 537 



circulatory system of, 68, 69, 72, 527, 528 



classification of, 542-553 



development of, 249-251, 256, 257, 262, 

 263, 273, 275 



digestive organs of, 528-531 



early, 538-542 



endocrinal system of, 220, 223 



evolution of, 541, 542, 793, 794 



flightless, 553-555 



Birds — (Continued) 

 flying, 542 

 frigate, 545 

 hand of, 511 

 heart of, 625 

 morphology of, 503-558 

 muscles of, 91, 98, 100, 518, 519 

 nervous system of, 149, 151, 160, 193, 



208, 210, 532-537 

 relationships among, 553-558 

 reproductive system of, 88, 233-235, 

 238, 240-242, 244-246, 537, 538 

 reptiles compared with, 553 

 respiratory system of, 519-527, 522 

 running, 542 

 skeleton of, 115, 122, 124, 128, 133, 511, 



512, 513-518 

 specialization in, 503-505 

 tail of, 515 

 toothless, 52, 56 



urinogenital organs of, 79, 88, 531, 532 

 Birth, 295 

 Bison, 757 



Bladder(s), air-(swim-), 276, 425, 427, 

 428, 433 

 gall, 14, 32 



urinary, 80, 185, 186, 276, 285, 293, 295. 

 474, 643 

 Blastocoele, 247, 249, 250, 251, 252, 254, 



255, 256 

 Blastoderm, 236, 251, 254, 256, 257, 262, 



263, 289 

 Blastodermic vesicle, 264, 265 

 Blastopore, 252, 253, 254, 255, 256, 257, 

 258, 262, 266, 267, 268, 273, 274, 

 296, 392 

 Blastula, 227, 228, 246-251. 250, 252, 253, 



255, 256, 263, 296 

 Blind spot, 204 

 Blindworms, 459 



Blood, 241-243, 328, 329, 330, 466, 527, 

 623, 634 

 calcium salts in, 222 

 glands, 65 

 platelets, 329 

 pressure, 227 

 Blood-vessels, 14, 18, 30, 34, 79, 82, L54, 

 155, 185, 241, 242, 269, 281, 286. 

 293 (see also Arteries, Veins, 

 Capillaries) 

 abnormalities of, 628 

 allantoic, 295 

 caudal, 114 

 in pulp-cavity, 37, 38 

 vitelline, 295 

 Blue jays, 553 



Body-cavitv (coelom), 16, 17, 21, 22, 87. 

 114, 269, 270, 275, 277, 278, 279, 

 281 

 Body-wall, 154, 155, 156, 157, 281 

 Bone(s), 102, 222, 226, 278, 284, 298, 299, 

 325, 326, 327 

 acetabulum, 129, 130, 131 

 alisphenoid, 124 

 angular, 126 



