588 



INDEX 



Ammonoids, 225, 613 

 Amnion, 375-378, 419, 421 

 Amniotic cavity, 377, 378, 418, 419 

 Amniotic fluid, 376 

 Amniotic fold, 377 

 Amniotic sac, 376 

 Amoeba, 63 



Amoeba proteus, 63, 64, 67 

 Amphiaster, 47 

 Araphiaster stage, 47 

 Amphibia, 334, 364 



Amphibians, 308, 334, 359-374, 417, 437-440, 442, 

 463, 504, 505, 511, 515 



(See also Cecilians; Frogs; Salamanders; Toads) 

 Am,phiboltps confluens, gall, 286 

 Amphicoelous vertebrae, 350 

 Amphineura, 217-218 

 Amphioxus, 308, 309, 313, 314-315 



development, 122, 307 



section, 313 

 Amphipods, 262 

 Ampullae, ear, 330, 331 



echinoderms, 193, 194, 204, 206 

 Amylopsin, 323 

 Anableps, 354 

 Anableps dovii, 364 

 Anabolism, 37 

 Anacondas, 385, 505 

 Anaema, 541 

 Anal ciliated cells, 226 

 Anal fin, 346, 348 

 Anal gland, 277 

 Anal opening {see Anus) 

 Anal spot, 71 

 Analogy, 63, 445, 543 

 Anaphase, 47, 48 

 Anaphylaxis, 492 

 Anatomy, 5, 550-553 

 Anaximander, 516 

 Andalusian fowl, inheritance, 636 

 Anger, 473 

 Angler fish, 358 

 Angleworm (see Earthworm) 

 Animal biology, 6 

 Animal pole, 118, 371 

 Animal husbandry, 6 

 Animals, 406 



in absence of oxygen, 463 



classification, 57-58, 541-548 



compared and contrasted with plants 40, 41 



distribution, 4, 499-509 



evolution, 516-526 



forms, 51 



groups, 57 



limit of size, 44 



number, 3 



relation to environment, 4, 477-486 

 to plants, 4, 477 



relations, 4 



variety, 3 

 Annelida, 241, 242, 545, 547 

 Annelids, 113, 229, S41-'24f), 268, 440-442, 445, 



462, 612, 513 

 Annual changes, 477, 482 

 Annular cartilage, 336 



Anodonta grandis, 208, 209 

 Anodontas, 215, 216 

 Anopheles, 89, 287 

 Ant bears, 415 

 Ant lions, 290 

 Antarctica, 500 

 Anteaters, 506 



Australian, 411 

 Antedon, 207 

 Antelopes, 416, 506 

 Antennae, 186, 250-253, 250, 261, 269, 271-273, 



277, 304, 305, 466 

 Antennary glands, 466 

 Antennata, 305 



Antennules, 250-253, 250, 261, 497 

 Anterior chamber, eye, 332, 333 

 Anthozoa, 143-146, 494 

 Anthrax, 555 



Anthropoid apes, 416, 422 

 Anthropology, 5 

 Antibodies (see Antitoxins) 

 Antimeres, 51, 544 

 Antitoxins, 490, 491 

 Antrum, 329 



Ants, 282, 284, 289, 291, 294, 295, 431, 455, 464, 

 481, 485, 494, 498, 543 

 white (see Termites) 

 Anuraphis maidiradicis, 284 



Anus, 71, 86, 138, 175, 176, 178, 179, 183, 186, 

 188, 189, 192, 195, 197, 200. 204, 205, 210, 

 212, 218, 219, 222, 229, 230, 241, 245, 252, 

 263, 296, 297, 301, 304, 311-314, 310, 321, 

 323, 367, 408, 438, 544, 545 

 Aorta, 313, 360 



dorsal, 317, 336, 339, 340, 360, 379 

 ventral, 339, 340, 360 

 Aortic arch, 360, 301, 379, 380, 393, 408, 409 

 Ape man, 424 

 Apes, 415, 422 



anthropoid, 416, 422 

 Aphids, 284 

 Aphis lions, 290 

 Apical plate, 226 

 Apiculture, 6 

 Apis melUfica, 291-293 

 Apoda, 364, 367 



Appendages, 53, 250, 251, 260, 265, 297, 300, 304, 

 316, 320, 335, 348, 361, 363, 467, 545 

 (See also Fins; Legs; Wings; Tails; Antennae; 

 etc.) 

 Appendicular skeleton, 318 

 Appendix vermiformis, 322, 408, 619 

 Apteryi, 605 



Aquatic environment, 460 

 Aquatic habitat, 478 

 Aqueous humor, 223, 332 

 Aquiculture, 6 

 Aquinas, Thomas, 517 

 Arachnida, 296, 305 

 (See also Spiders) 

 Arachnoidea, 305 

 Arbacia, 203 



Arboreal life, 382, 415, 422, 423 

 Arch, foot, 423 

 Archaeopteryx, 515 



