852 



INDEX 



Birds, excretory system of, 477 



feet, 482 



flight, 468 



migration of, 483 



muscles, 174 



na\igation, 484 



origin, 478 



reproduction, 483 



respiratory system of, 476 



sense organs, 477 



skeleton, 472 



structure of, 471 



wings, 468 

 lUrtii, ,'')72 

 Birth rate, 771 

 Biting lice, 802 

 Blastocoele, 126, 128, 420 

 Blastocyst, 638 

 Blastoidea, 838 

 Blastomeres, 1 26, 637 

 Blastopore, 126, 381, 420 

 Blastula, 126, 420 

 Blattaria, 837 

 Blind spot, 578 

 Blood, 58, 537, 538 

 Blood cells, 84 

 Blood dotting, 541 

 Blood flukes, 214, 810 

 Blood groups, 544 



inheritance of, 678 

 Blood pressure, 546, 618 



dogfish, 546 



frog, 549 



man, 555 

 Blood velocity, man, 555 

 Blood vessels, 84 

 Bloodsuckers, 269, 802 

 Blubber, 503 

 Blue baby, 551 

 Bluebird, 480 

 Blue whale, 498 



Body fluids, regulation of, 559, 564 

 Body folds, 642 

 Body stalk, 640 

 Bolus, 517 

 Bone, 57 

 Bonnelia, 354 

 Bony fishes, 437 

 Bony scales, 448, 504 

 Book gills, 320 

 Hook lungs, 321, 322 

 Botflies, 813 

 Bothriocephaloidea, 833 

 Bouditch, Henry, 10 

 Bowfin, 440 



Bowman's capsule, 93, 562 

 Brachet, Jean, 35 

 Brachiopoda, 3.55, 356, 381 

 838 



Brain, inhibitory center. 275 



parts of, 597 



stimulatory center, 275 

 Branchial arches, 432, 508 

 Branchial muscles, 512 

 Branchiopoda, 303, 836 

 Brnnrluostonut, 387 

 Branchiura, 836 

 Breathing, 311, 533 



in frog, 407 

 Breeding habits, 125 

 Bridges, C. B., 660 

 Brittle stars, 375 

 Broad-leaved evergreen subtropical forest 



biome, 791 

 Bronchus, 407, 476, 532 

 Brontosaurus, 462, 840 

 Brood pouch, 303 

 Brow spot, 395 

 Brownian movement, 49 

 Bryozoa, 356, 838 

 Bubonic plague, 802 

 Buccal funnel, 429 

 Biichner, Edward, 66 

 Budding, 116, 189 

 Buffer, 539 

 Bufo, 840 



Bullock, T. H., 274 

 Busy con, 248-251, 834 

 egg case of, 250 



Caecilians, 448 

 Caecum, 82, 521 

 Calcar, 401 

 Calcarea, 175, 832 

 Calciferol, 527 

 Calciferous glands, 276 

 Calcium, 23, 614 

 Calcium carbonate, 328 

 Caloric requirements, 525 

 Calorie, 65, 525 

 Calorimeter, 610 

 Cam barns, 293, 836 

 Cambrian period, 72 1 

 Camels, 499 



body lice of, 819 

 Canada goose, 484 

 Canal of Schlemm, 573 

 Canine, 516 

 Canine tooth, 487 

 Cape Verde Islands, 734 

 Capillaries, 86, 537 

 Capillary exchange, 555 

 Caprimulgiformes, 841 

 Caprimulgus, 841 

 721, Carapace. 294, 456 



Carbaminohemoglobin, 539 



