INDEX 



851 



Arrector pili, 505 

 Arrowworms, 357 

 Arteries, 86, 537, 5.54 

 Arterioles, 554 

 Arthropoda, 289-350, 835 



behavior of, 340 



circulatory system of, 299 



classification of, 289 



physiology of, 326-350 



visual acuity of, 337 

 Articular bone, 465 

 Articulata, 838 

 Artifacts, 751 

 Artificial selection. 732 

 Artificial stocking, 825 

 Artiodactyla, 498, 842 

 Ascaris, 833 



life cycle of, 230 

 Ascaris lumbricoides, 120. 229, 806 

 Ascaroidea, 833 

 Aschelminthes, 220, 833 



classification of. 220 

 Ascidiacea, 384, 839 

 Ascon, 832 



Asconoid sponges, 173 

 Ascorbic acid, 527, 528 

 Ascothoracica, 836 

 Aspidobothria, 833 

 Aspidospondyli, 840 

 Association areas, 603 

 Association neurons, 602 

 Astacus, 293, 836 

 Asterias, 364-370, 838 

 Asteroidea, 370, 838 

 Asthma, 618 

 Atlas, 400, 509 

 Atom, 19 



Atrioventricular node, 553 

 Atrium, 86, 386, 388, 411, 545, 549 

 Augmentation. 564 

 Amelia, 192, 193, 833 

 Auricle, 249 

 Auricularia larva, 379 

 Australian bushmen. 749 

 Australian realm, 736 

 Australian sidenecked turtle, 456 

 Australopithecus, 743 

 Autocatalytic particles, 712 

 Autolytus, 281, 834 

 Autosomes, 660 

 Autotrophic nutrition, 78 

 Autotrophs, evolution of, 712 

 Aves, 390, 468, 840 

 Axial filament, 61 

 Axis, 509 

 Axolotls, 451 

 Axon, 60, 332 



giant. 106, 274 

 Aye-aye, 494 

 Aysheaia, 325 



B 



Baboons, 740 



Bacon, Roger, 9 



Bacteriophages, 684 



Balaenoptera, 842 



Balantidium coli, 807, 832 



Bandicoots, 492 



Barbules, 471 



Barriers, 787 



Basal body, 150, 151, 165 



Basal metabolic rate, 525 



Base, 23 



Basement membrane, 54 



Basilar membrane, 584 



Basket stars. 375 



Basophils. 59, 542 



Bath sponges, 177 



Batoidea, 436, 839 



Bats, 492 



Bayliss, William, 11, 525 



Beadle, George, 687 



Beagle, voyage of, 698 



Bears, 497 



Beavers, 500, 825 



Bee language, 347 



Beebread, 318 



Bees, vision of, 338 



Belemnoidea, 834 



Bell, Charles, 10 



Benthos, 795 



Beriberi, 5, 83, 527, 528 



Bernard, Claude, 10 



Bestiaries. 9 



Beutner, R., 710 



Biceps, 101, 514 



Bicuspid \al\e, 553 



Bile, 406, 520 



Bile pigment, 520, 541 



Bile salts, 520 



Bills, bird. 482, 781 



Binomial system of nomenclature, 140, 



145 

 Biochemical genetics, 683 

 Biochemical recapitulation, 729 

 Biogenetic Law, 729 

 Biogeographic realms, 735 

 Biogeography, 733 

 Bioluminescence, 75 

 Biome, 789 



Biotic comminiity, 769, 77.5-777 

 Biotic potential, 773 

 Biramous appendages, 289 

 Bird lice, 802 

 Birds, 468 



behavior of, 481 



bills, 482, 781 



circulatory system of, 477 



digestive system of, 475 



evolution of, 478 



