INDEX 



Albumen, 131, 144 



Alcyomdium, larva of, 361 



Aldosterone, 121 



Aleutian Islands, early man in, 644 



Algae, 606 



Allantois, 132,157,162 



Allelomorphic genes, 184, 190, 197 



Alliaalor mississippiensis, 574 



Alligators, 541, 572 



Alloeocoela, 316, 327 



Allolohophorafoetida, 412 



Allostoma mistriacum, 327 



Alloxan. 120 



Alpaca, 631 



Alpha cells, 120 



Altitude, and low temperature, 600; efTect on 

 respiration, 600 



Alveolar air, 81 



Alveolar glands. 60 



Alveolar membrane, 80 



Alveolus, of lung, 55, 56, 80 



Amber, 621 



Ambulacral svstem, ol' Aniedoru 508; of starfish, 

 494, 495; of Thyone, 504, 505 



Amhystoma, 563, 564 



American Indians, 644 



Ametabolous development, 454; in Protura, 

 457; in Thysanura, 458 



Amia, 558 



Amino acids, 27, 30, 37, 72, 75, 78, 84, 122; 

 essential, 30 



Aminopeptidase, 72 



Amitosis, 39; in nematodes, 351; in Parame- 

 cium, 254 



Ammonia, 38, 79, 518 



Ammonoids, 388, 623, 624 



Amnion, 132, 162 



Amoeba, 228, 230 236, 521 



Amoeba prnleus, 233, 234 



Amoebas, commensal, 239; parasitic, 237 



Amoebiasis, 237 



Amoebic dysentery, 237 



Amoebocytes, of sponges, 275, 279 



Amoeboid cells, in coelom of starfish, 493; of 

 invertebrates, 521 



Amoeboid movement, 231-233 



Amphibia, 214, 215, 216, 217, 541, 562-565 



Amphibians, as primitive types, 631; blastula 

 of, 150; gastrula of, 150; of Devonian pe- 

 riod, 560; small intestine of, 69; transplan- 

 tation in embrvos of, 166; water relations 

 of, 602 



Amphiblastula, 281 



Amplnleplus, 257 



Amphimixis, 143 



Amphineura, 216, 369, 381, 382 



Amphioxi, 550 



Amp/uoxus, see Brariihiostoma 



Amphioxus, development of, 147 



Amphiporus pulcher, 341 



Amphitrile, 401 



Amphtuma, 563, 564 



Ampullae, of starfish tube feet, 493, 495; of 

 vertebrate ear, 90, 108 



Amyda, 567, 570 



Amylase, in pelecypods, 373; in vertebrates, 



pancreatic, 72; salivarv, 71 

 Amylopsin, 72 

 Anabolism, 13, 38 

 Anaerobic environments, 599 



Anaerobic phase of respiration, 36 



Anaerobic respiration, in Ascans, 352; in intes- 

 tinal parasites, 517, 599; in saprozoic proto- 

 zoans, 599 



Anal spot, in Paramecium, 249 



Analogous structures, 220, 510, 536 



Anamorphic growth, 478 



Anaperus gardineri, 327 



Anaphase, 43, 136 



Anasa tristis, 462 



Ancestral mollusk, 393 



Ancylosloma diiodenale, 352 



Andes, camels of, 631 



Angel fish, 560 



Animal groups, general characteristics, 224 



Animal hemisphere, 146 



Animal Kingdom, 218, 222. 223; list of phyla, 

 216; phylogenetic tree, 219 



Animal populations, 609-614 



Anisogametes, 136, 141 



Anisogamv, in colonial flagellates, 267 



Annelida, 216, 219, 221, 368, 369, 396-421 



Annelids, circulatory system, 513, 516; cuticle, 

 528; fossil remains, 621; nervous integration, 

 523; reproductive system, 533 



Anodonla, 370, 371, 377, 378 



Anomia simplex, 380 



Anopheles, 476 



Anosia plexippits, see Danaus memppe 



Anteater, 580 



Anledon rosaceus, 506, 507 



Antenna, of crayfish, 426; of lobster, 427; of 

 locust, 445 



Anthozoa, 216, 285, 307 



Antibodies, 64, 65, 164, 635 



Antidiuretic hormone, 118 



Antigens, 65, 164, 199 



Antihemorrhagic vitamin, see Vitamin K 



Antipellagric vitamin, see Nicotinic acid 



Antipernicious anemia vitamin, see Cyano- 

 cobalamin 



Antiscorbutic vitamin, see A.scorbic acid 



Antisterilitv vitamin, see Vitamin E 



Antithrombin, see Heparin 



Anlrozous pallidas, 584 



Ant.s, 469; light perception, 452; social organi- 

 zation, 475 



Anus, 50 



Apes, 580, 586, 587, 591, 638 



Aphids, parthenogenesis in, 143, 535 



680 



