648 



INDEX 



Bones (cont.) 



occipital, 329, 330 



skull, 329, 330 



wrist, 332 

 Bony fishes, 107 

 Boophilus annulatus, 216 

 Bose, J. C, 371 

 Botany, systematic, 64 

 Botflies, 216 

 Boule, estimate of geological time by, 



553 

 Bowman's capsule, 323, 324 

 Boyle, Robert, 528 

 Brachiopoda, 91, 328 

 Brachiopods, 485 



rise of, 513 

 Brain, 329, 344 



anatomy and development of, 345- 

 352 



human, 544, 545, 551 



parts of the vertebrate, 34? 

 Branchiostegite, 315 

 Breastbone, 331 

 Breeding, practical, 452-454 

 Bretz, estimate of geological time by, 



553 

 Brittle-stars, 328 



Broad tapeworm, distribution of, 614 

 Bronchioles, 317 

 Bronchus, 317 

 Bronze age, 547 

 Broomrape, 216 

 Brown-Sequard, 391 

 Brues, work of, on physical adapta- 

 tions, 490-491 

 Bryophyta, 73 

 Bryozoa, 91 

 Bryozoans, 491 

 Bubonic plague, 222, 620-621 

 Buccopharyngeal respiration, 314 

 Budding, 410 

 Bugula, 91 

 Bullfrog, 490 



Bulls, pedigree breeding with, 453 

 Bumpus, report of on survival in spar- 

 rows, 520 

 Burbank, plant breeding of, 455 

 Busycon, 97 

 Buttel-Reepen, estimate of geological 



time by, 553 

 Butterflies, sex heredity in, 468 



Cacti, biological adaptations in, 493 



Cactus, spineless, 455 



Caeca, 283 



Caecilia, 109 



Caecilians, 499 



Calcaneus, 543 



Calcarea, 79 



Calciferous glands, earthworm, 189 



Calcium, 277 



Calorimeter, bomb, 276 



Calyces, 323 



Cambium, 245, 246, 248 



Cambrian period, 476, 513 



Camel, evolution of, 509 



Camera eye, 358 



Camouflage, a biological adaptation, 



492 

 Cancer, 612 

 Canines, 286 

 Cannibalism, animal, 49 

 Capillaries, 304, 305, 309 



lymph, 304 

 Capillary tube, 268 

 Capsule, moss, 176 

 Capuchins, 536 

 Carbohydrates, 276, 277, 298 

 Carbon dioxide, 318 



use of in starch-making, 254 

 Carboniferous, 476, 513 

 Cardiac plexuses, 354 

 Cardiac portion of stomach, 288 

 Caribou, distribution of, 509 

 Carnegie Trust, 516 

 Carnivora, 115 



Carnivores, and struggle for existence, 

 520 



blood relationships in, 514 



structure adaptations in, 487 



teeth of, 52 

 Carnivorous plants, 53-54 

 Carotin, 258 

 Carpal bones, 332 

 Carrel, Alexis, 610 

 Carriers 



disease, 630-631 



mechanical, 221 

 Carrion beetle, 490 

 Carrot, 239 

 Cartier, Jacques, 570 

 Carteria, 69 

 Cartilage, 329 

 Cassowaries, 113 

 Castings, earthworm, 190 

 Castle 



definition of gene by, 457 



experiments of with germplasm, 438 

 Casts, fossil, 478 

 Casuariiformes, 113 

 Cat, 495, 499 

 Catalyst, 280 

 Catherinia, 73 

 Cattle, 511, 515 



superior strains of, 573 

 Cave-bears, 550, 557 

 Cave-dwellers, 492, 500, 552, 557 

 Cave-hyena, 550, 557 



