820 



INDEX 



Antibodies, 199, 208-210, 416 



Antigens, 208-210. 416 



Antitoxin, 208, 416 



Antivenins, 722 



Antlers, 132, 133 



Anura, 685 



Aorta, 215, 216, 248, 701 



Aortic arches, 699, 786 



Aphids, 591, 598 



Aphrodite aculeata, 5(il 



Apis meUifica, 612 



Apoda, 687 



Appendages, jointed, 572, 574, 579 



of vertebrates, 148 

 Appendicular skeleton, 146 

 Appendix, 194. 786 

 Aqueous humor, 326, 327 

 Arachnids, 574. 663, 798 

 Arachnoid layer, 301, 302, 303 

 Arachnoidea, 622-629 

 Arhcicia piinctiilata, 337 

 Arcella, 78, 441 

 Archenteron, 365-367, 372 

 Archeopteryx, 727, 750, 751 

 Archiannelida, 571 

 Archosauria, 728 

 Argonauta, 648 

 Argyroneta, 622 

 Aristotle, 477, 479, 575, 787 

 Army worm, 597 

 Arrow worm, 549-551, 797 

 Arterioles, 222, 699 

 Artery, 213, 221 

 Arthropods, 572-629, 663, 798 

 Artiodactyl, 763 

 Ascariasis, 100 

 Ascaris liimbricoides, 519, 520 



life history, 520, 521 

 Aschheim-Zondek pregnancy test, 383 

 Ascon, 457 

 Ascorbic acid, 171 

 Asker, 683 

 Assimilation, 168 

 Asterias jurbesi, 655, 657, 660 

 Asteroidea, 652, 653, 798 ^ " 



Asthma, 234 

 Astigmatism, 330 

 Astrangia, 466, 467, 489 



danae, 487 

 Atlas, 693 



Atmospheric pressure, 81, 83, 224, 225 

 Atoms, 1, 9, 12-16, 17 

 Atretic follicle, 347 

 Atria. 701 



Auditory canal, 317 

 Auditory nerve, 320 

 Aurelia, 467, 483, 485, 797 



life cycle, 484 

 Auricle, 317. 318, 320, 500, 700 

 Auriculoventricular node, 217, 218 

 Autolytus, 331 



Autonomic nerves, 293, 294, 708 

 Autonomic nervous system, 295, 297 

 Autonomy, 585 

 Autosomes, 404 

 Aves, 666 

 Avicularia, 546 

 Axial gradient, theory of, 506 

 Axial skeleton, 146. 147, 150 

 Axolotls, 684, 685 



Axon, 122, 123, 281, 282, 283, 286, 287, 

 292, 297, 299, 306 



B 



Backcross, 399, 400, 401 

 Balanoglossus, 662, 663, 665 

 Balaniis halanoides, 75 

 Baldness, 407, 409 

 Banta, A. M., 412 

 Banting, F. G., 268 

 Barbules, 733 

 Barnacles, rock. 75 

 Basilar membrane, 320, 321 

 Basket stars, 653 

 Basophils, 202, 205, 207 

 Bats, 759. 799 



long-eared, 761 

 Bayliss, Sir William M., 192, 255 

 Beaks, bird, 734, 735, 736, 738 

 Becquerel, H., 12 

 Behavior, competition, 91. 92, 104 



cooperation, 91-93, 94, 100, 104 

 Bends, 83, 85, 226 

 Beriberi. 173 

 Bernard, C, 259 

 Berthoid, C, 259 

 Best, C. H., 268 



Between brain, 302, 303, 305, 706 

 Biceps muscle, 158, 159 

 Bile, 189-191, 212, 697, 703 

 Bilharzia, 100, 511 

 Binocular vision, 324 

 Biology, 4 



Bioluminescence, 435, 568, 569, 647, 649 

 Bipalitim kewense, 508 

 Birds, 178, 666, 729-751, 799 

 Birth process, 384 

 Bivalves, 635 

 Bladder, urinary, 247, 251, 340, 343, 346, 



379, 697, 709 

 Blastocoel, 365, 366. 368, 370, 372 

 Blastopore, 366, 369, 370, 373 

 Blastula, 365, 366, 368, 369, 372, 477, 



659 

 Blind spot, 327 

 Blood, 119, 123 



circulation of, 215, 216, 217, 219 



human, 196 



relation to lymph. 213 

 Blood clot, 211, 212 

 Blood groups, 209, 210, 415, 416 



