INDEX 



Numbers refer to pages. Bold face numbers indicate Figures and Tables. 



ABDOMINAL PORES, 236 



Abel, 445 



Abomasum, 434 



Absorption, 109 



Acanthocephala, 96 



Acarina, 201 



Accessory chromosome, ^23 



Acid secreting glands, octopus, 158 



Ackert, 93 



Actinozoa, 6^ 



Action of the heart, 453 



Adaptation of fishes, 261 



Adaptation of leech, 117 



Adaptations of reptilia, 332 



Adhesive pads, 310 



Adipose, 426, 436 



Adrenals, 447 



Aedes, 189 



Aelosomatidae, 105 



African buffalo, 407 



African crocodile, 309 



African "hairy frog," 291 



African lung-fishes, 252 



African wart hog, 401 



African Wild Ass, 400, 491 



Age, Piltdown Man, 416 



Aglossa, 293 



Agglutination, 458 



Akeley, 414 



Albatross, 339 



Albino rat, 393 



Alcohol and snake-bite, 329 



Allen, 444 



Alligator snapping turtle, 305 



Alpaca, 402 



Alpha hormone, 449 



Alpine marmot, 392 



Alpine race, 417 



Alpine salamander, 267 



Alternate functioning of the ovaries, 532 



Alternation of generations in Obelia, 59, 

 60-61 



Aluminium, 440 



Alveolar theory, 8 



Ambulacral plates and pores, 132 



Ambystoma, 268 



Ameba proteus, 22 



Amenenhat I, lion-hunter, 381 



American alligator, 309 



American bison, 407 



American black snake, 315 



American caribou, 403 



American "chameleon," 313 



American crocodile, 309 



American eagle, 345, 346 



American elk or wapiti, 402 



American golden plover, 342, 366 



American goshawk, 346 



American hook-worm, 92 



American monkeys, 412 



American moose, 402, 404 



American porcupines, 394 



American woodcock, 343 



Amia calva, 242 



Amitosis, 500 



Amitosis in the cockroach, 500 



Ammocoetes, 223 



Amnion and Allantois, 302 



Amniota, 302 



Amphibia, 265-301; classification, 265; 

 characteristics, 265; economic impor- 

 tance, 300; fossil relatives, 300 



Amphidiscs, 50 



Amphioxus, 214 



Amphioxus Theory, 217 



Amphipoda, 173 



Amphitrite, 104 



Amphiumidae, 267 



Amylopsin, 432 



Anabolism, 8 



557 



