Index 



695 



Biochemical genetics, 316 

 Biochemistry, 20 

 Biogenetic law, 508, 647 

 Biogenesis, 320 

 Biology, 19-20 

 Biome, 651-657 

 Biophysics, 20 

 Biotic factors, 651 

 Bipinnaria, 547, 550 

 Bipolar nerve, 384 

 Biradial symmetry, 345 

 Biramous appendages, 492 

 Bird, 614-625, 649, 650 

 biology, 617-623 

 classification, 45, 46, 259, 561, 567, 



617 

 circulatory system, 162, 164, 165, 



166 

 digestive system, 130, 131, 133 

 economic importance, 623 

 egg, 268 



embryology, 281, 284, 290-291 

 integument, 71, 78, 79, 82, 85, 88-90, 



91 

 nervous system, 197, 220 

 origin, 613 



respiratory system, 148, 151 

 reproductive system, 241 

 sex determination, 310 

 skeleton, 109, 112 

 urinary system, 185, 186 

 Bird lice, 538 

 Bird of paradise, 621 

 Bispira, 454 

 Bittium, 476 

 Bivalve, 471 

 Bivium, 545 

 Black bass, 590 

 Black fly, 437 

 Black snake, 608 

 Black widow spider {see Latrodectus), 



512. 515 

 Blackhead, 81 



Bladder, gall, 60, 129, 137, 140, 141, 

 142 

 urinary, 61, 187, 191 

 worm, 418 

 Blarina, 630, 632, 634 

 Blastocoel, 280, 345, 346 

 Blastocyst, 285 

 Blastoderm, 280 

 Blastomere, 280, 293 

 Blastopore, 282, 294, 559 

 Blastostyle, 391 

 Blastula, 280, 356. 644 

 Blepharoplast, 353 

 Blind spot, 215, 218 

 Blood, 68, 176-182 

 calcium, 232, 233 



Blood— Cont'd 



cell formation, 93 



cells, 179, 181 



clotting, 146, 178, 179-180 



coagulability, 234 



fluke (see schistosome), 415 



formed elements, 176-178 



of frog, 68 



gas, 178 



liquid portion, 178-179 



plasma, 178-179 



pressure, 174-175, 247 



sugar, 234, 238, 239 



types, 180-181, 307 



vessels (see Artery, Vein, or Capil- 

 lary) 

 Blowhole, 637 

 Blubber, 76 

 Boa constrictor, 610 

 Body, cavity, 128, 345-346 



disc, 553 



of epididymis, 257 



fluid, 186 



stalk, 285 



of vertebra, 105 



wall, 155, 204 

 Bolas spider, 513 

 Bombyx mori, 535 

 Bone, 38, 95-97 



building, 232 



compact, 95 



destroying, 232 



frontal, 215, 216 



malar, 215 



maxilla, 215 



membrane, 99 



miscellaneous. 111 



shaft, 98 



spongy, 95 



temporal, 221 

 Bony labyrinth, 221, 223 

 Booby, 625 



Book lungs, 488, 510, 512 

 Bos (see Cattle) 

 Bot fly, 518, 540 

 Botany, 20 

 Bothrops, 610 

 Bowfin, 569, 582, 590 

 Bowman's capsule, 185, 188, 189, 190 

 Box turtle, 605 

 Brachial plexus, 204 

 Brachiolaria, 548 

 Brachiopoda, 348, 484 

 Brain, of frogs, 69, 70 



of lamprey, 572 



of perch, 586 



of Squalus, 579 



of vertebrate, 192, 193, 194, 196-202, 

 566 



