INDEX 



Ascones, 204 



Ascons, 201 



Ascyssa, 203 



Asellidas, 386 



Asiliidas, 431 



Asiphonate, 319 



Asp, 531 



Aspidobranchia, 333 



Aspidochirotse, 308 



Aspidocotylidse, 244 



Aspidonectes, 527 



Aspidotus, 430 



Assimilation, .91 



Astacoidea, 380 



Astarte, 324 



Aster, 60 



Asterias, 298 



Asteridae, 298 



Asteriscus, 298 



Asterinidfe, 298 



Asteroidea, 295 



As trophy ton, 299 



Asterospondyli, 506 



Astrsea, 232 



Astrangia, 231 



Astroides, 232 



Ass, 568 



Asymmetrical animals, 123 



Asymmetron, 441 



Atalapha, 565 



Atavism, 141 



Atax, 397 



Ateles, 574 



Atelodus, 568 



Atheca, 527 



Atlantidas, 334 



Atlas, 514, 522 



Atoke, 275 



Atolla, 224 



Atriopore, 440 



Atrium, 445, 516 



of heart, 101, 483 

 Atrypa, 290 

 Attus, 396 

 Atypus, 396 

 Auchenia, 569 

 Auditory bulla, 548 



organs, 116 



ossicles, 116, 461, 479 

 Auks, 543 

 Aulophorus, 278 

 Aurelia, 214, 223 

 Auricle, 101, 483 

 Auricularia, 294 

 Aurochs, 569 



Autoflagellata, 181 

 Autogamy, 174 

 Autoinfection, 186 

 Autolytus, 277 

 Aves, 532 

 Avicularia, 286 

 Aviculidffi, 323 

 Axial skeleton, 91 

 Axis, 522 

 Axis cylinder, 85 

 Axolotl, 520 

 Axon, 84 

 Aye-Aye, 572 

 Azygobranchia, 333 



Babesia, 190 

 Baboons, 574 

 Bietisca, 420 

 Bakena, 572 

 Batenoptera, 572 

 Balancers, 430 

 Balaninus, 424 

 Balanoglossus, 448 

 Balantidium, 196 

 Balanus, 374 

 Baleen, 571 

 Bandicoot, 560 

 Barnacles, 371 

 Basalia, 292, 300, 463 

 Bascanion, 531 

 Basioccipital, 458 

 Basipodite, 97, 360 

 Basisphenoid, 458 

 Bassomatophora, 336 

 Bats, 564 

 Bdellostoma, 493 

 Bdellura, 242 

 Beach fleas, 384 

 Bears, 565 

 Beaver, 566 

 Bedbug, 428 

 Bee louse, 431 

 Bees, 426 

 Beetles, 423 

 Belemnites, 341 

 Bell's law, 468, 472 

 Belosepia, 341 

 Belostoma, 428 

 Bicidium, 230 

 Bilateral symmetry, 124 

 Bile duct, 481 

 Bilharzia, 247 

 Binomial nomenclature, 7 

 Biogenesis, law of, 26 

 Biology, 50 



Biometric method, 4 

 Bipalium, 242 

 Bipinnaria, 294 

 Bipolar cells, 84 

 Biradial symmetry, 124 

 Bird lice, 420 

 Birds, 532 



Birds of Paradise, 41, 544 

 Birgus, 381 

 Bison, 569 

 Bittacus, 422 

 Bivium, 291, 296 

 Black fish, 572 

 Black flies, 430 

 Black snakes, 531 

 Bladder worm, 247 

 Blarina, 564 

 Blastoderm, 143 

 Blastodermic vesicle, 145 

 Blastoidea, 303 

 Blastomeres, 141 

 Blastopore, 146 

 Blastostyle, 218 

 Blastula, 145 

 Blatta, 421 

 Blepharoplast, 182 

 Blind fish, 510 

 Blissus, 428 

 Blister beetles, 424 

 Blood, 78 



arterial, 103 



Blood- vascular system, 103 

 Blood, venous, 103 



vessels, 100 

 Blow flies, 431 

 Bluebirds, 544 

 Boa, 531 

 Bobolink, 544 

 Body cavity, 99 

 Bojanus, organ of, 321 

 Bolina, 235 

 Bombycina, 433 

 Bombyx, 433 

 Bone, 77 



Bones, membrane, 451 

 Bonasa, 543 

 Bonellia, 281 

 Book lice, 420 

 Bopyrirlac, 386 

 Bos, 569 

 Bosmina, 366 

 Botall's duct, 485 

 Bot flies, 431 



Bothriocephalus, 249, 254 

 Botryllus, 446 



