INDEX 



589 



Archaeopieryx macrura, 397 



Archaeopteryx siemensi, 396 



Archaeornithes, 390 



Archeaii period, 511, 512 



Archenteron, 119-123, 372, 419, 438 



Archiannelida, 242 



Arctic tern, 402 



Argonauta argo, 224 



Aristotle, 25, 358, 516, 541, 549, 552, 554 



Aristotle's lantern, 203, 204, 43S 



Armadillos, 40(), 415, 505 



nine-bauded, 414, 538 

 Arms, 316, 424 

 Army worm, 285 

 Arrow worm, 185 

 Arteries, 297, 324, 551, 552 



Arthropoda, 200, 2G8, 271, 290, 304-305, 545, 547 

 Arthropods, 250-305. 437-439, 441, 443, 445, 



449,462,407,472,513 

 Articular cartilage, 104 

 Artificial classification, 57 

 Artificial immunity, 491 

 Artificial parthenogenesis, 112-113 

 Artiodactyla, 410 



foot bones, 415 

 Ascaris, 175-170, 403, 498 

 Ascaris, 113, 114, 447 

 Ascaris lumbricoides, 175 

 Ascidians, 310-311 

 Ascon, 129, 130 

 Asexual cycle, 88 



Asexual reproduction, 45, SO, 105, 100, 132, 

 134, 135, 140, 149-151, 161, 168, 174, 189, 

 225, 230, 248, 249, 313-314 

 Asexual spore, 88 

 Asexual zooid, 248, 249 

 Asphalt lake, fossils, 510 

 Asses, 421 



wild, 507 

 Assimilation, 32, 33, 35, 42, 05, 71, 168 

 Association fibers, 239 

 Associations of animals, 493-498 

 Associative memory, 473 

 Astacus, 253 



Astacus fluviatilis, section, 253 

 Asteroidea, 201 

 Asters, 40, 47, 112, 113 

 Astral rays, 40, 47 

 Asymmetry, 51, 70 

 Atoll, 152 

 Atom, 8 



Atrial cavity, 311-314 

 Atrial funnel, 310, 311 

 Atriopore, 311, 313, 314 

 Atrium, 314 



genital, 160-162 



of heart, 340 



(See also Auricle) 

 Auditory meatus, 330 

 Auditory nerve, 330 

 Auditory organ (see Ear) 

 Augustine, 516 

 Aurelia, life history, 149 

 Auricle, 210, 339, 340, 301, 379, 380, 393 

 Auricularia, 206 



Australian region, 505, 500 



Australian lady beetle, 289 



Author's names, 59, 546 



Autogenous vaccines, 492 



Autonomic nervous system, 327 



Autonomic centers, 408 



Autosomes, 537 



Autotomy, 184, 198, 202, 205, 258, 281, 489 



Aves, 334, 390, 396 



Avicularia, 188, 189 



Avoiding reaction, 72 



Axial gradient, 163, 237 



Axial skeleton, 318 



Axis cylinder process (see Axon) 



Axolotl, 365, 374 



Axon, 100, 101, 238 



B 



Babbling thrushes, 507 

 Baboons, 416 

 Back swimmers, 284 

 Bacteria, 27, 458, 512, 552 



in chemical cycles, 459 



in food cycle, 458, 480 

 Bacterial action, 458, 459 

 Bacterial theory, 26 

 Badgers, 413, 417, 507 

 Bailer, 250 

 Baker, F. C, 219 

 Balance, animal life, 480 



in body, 433 



income and outgo, 430 

 Balancers, 275 

 Balanoglossus, 309-310, 547 

 Balantidial dysentery, 87 

 Balantidium, 87 

 Balantidium coli, 84 

 Balanus hameri, 264 

 Balanus tintinnabulum, 264 

 Baleen, 417 



Ballooning spiders, 299 

 Bandworms, 183, 184 

 Barbels, 330 

 Barbs, 391 

 Barbules, 391 



Barnacles, 263-264, 494, 497 

 Barriers to dispersal, 500-501 

 Basal disc, 134, 135, 139 

 Basal granules, 466 

 Basal metabolism, 465 

 Basal plate, 146 



Basement membrane, 97, 264, 256, 437 

 Bases, 8 



Basket stars, 202 

 Bats, 412-413, 417, 505, 500 



wing, 52 

 Beach fleas, 262 

 Beaks, 379, 390, 399, 401 

 Bears, 413, 419, 500, 507, 509 



foot, 414 

 Beasts, 406 

 Beavers, 415, 507 



skull, 407 

 B6che-de-mer, 207 



