414 



INDEX 



Aiiabolism, 48 



Analogy, in taxonomy, 266 



Anaphases, 71, 74 



Anasa, maturation in, 253; sex-determi- 

 nation in, 253 



Anaspidacea, classified, 270 



Anatomy, 2, 10, 11, 14; comparative, 17, 

 18, 21, 337 



Anaximander, 8 



Anemones, classified, 272 



Animal associations (see Associations) 



Animal biology, 1 



Animal communities (see Associations) 



Animal geography (see Zoogeography) 



Animal husbandry, 24 



Animal organizations, 93 



Animal pole, 213, 215, 220 



Animals, adaptations of, 275, 276; apa- 

 thetic, 262; dependent upon envi- 

 ronments, 307; intelligent, 262; range 

 of aquatic, 297; range of forest, 292, 

 294 ; range of plains, 292, 294 ; range 

 of prairie, 292, 294; range of terres- 

 trial, 297; relation to environment, 

 275; relation to plants, 282; sensi- 

 tive, 262 



Animals and Plants under Domestica- 

 tion (Darwin), 342 



Anisogamy, 176 



Annelida, 100, 101; classified, 269, 272; 

 digestive system of, 117; nervous 

 system of, 139 



Annelids, 187 



Anseriformes, classified, 271 



Anterior, 105 



Anthomedusse, classified, 269 



Anthophysa, 86 



Anthophysa vegetans, 87 



Anthothrips niger, 181 



Anthozoa, 96; classified, 269, 272 



Anthropoid apes, 335 



Antipathidea, classified, 269 



Ants, 181; classification of, 264; poly- 

 morphism in, 278; slavery in, 280 



Anus, 116, 117, 120, 225, 228, 229 



Aorta, dorsal, 124 



Aperture, atrial, 103; colonial, 103; oral, 

 103 



Aphids, 181 



Aplacophora, classified, 269 



Apoda, classified, 271 



Appendages, in insect and man, 134 



Appendicular skeleton, 135; parts of, 137 



Applications of zoology, 24 



Aptera, classified, 270 



Apterygiformes, classified, 271 



Aquatic animals, adaptations, 275, 276, 

 277; care of fertilized eggs, 198; 

 disposition of eggs, 204; fertiliza- 

 tion in, 192, 194; method of bearing 

 young, 198; parental care in, 204, 205 



Arabian camel, 329 



Arachnida, classified, 270, 273 



Araneida, classified, 270 



Archaeopteryx, 331 



Archaeornithes, classified, 271 



Archenteron, 220, 221, 222, 223, 225 



Archeozoic, in time scale, 315 



Archiannelida, classified, 269, 273 



Aristotle, 7, 8, 9, 10, 12 



Armadillo, range of, 289 



Arrow-worm, 207 



Arterial blood, oxygen in, 149 



Arteries, 123; muscles of, 156 



Arthropoda, 173; classified, 270, 273; 

 locomotor organs of, 135; nervous 

 system of, 140 



Arthropods (see Arthropoda) 



Articulated type, 18 



Artificial evolution, 363 



Artificial parthenogenesis, 186, 187 J 



Artiodactyla, classified, 271 



Artiomorphes, 262 



Ascaris, 76, 115, 208 



Ascaris megalocephala, 79; fertilization 

 in, 216; origin of germ cells in, 207- 

 208 



Ascidiacea, classified, 270 



Ascidian, 103, 169 



Asexual reproduction, 168; limits of, 172 



Aspidobranchia, classified, 269 



Assimilation, 57. (See also Digestion.) 



Associations, colony formation, 275, 277, 

 278; dependent on plants, 277, 281, 

 282; examples of, 283, 284; formed 

 by environmental factors, 284, 287; 

 formed by physical environment, 

 277, 282, 283, 284; mimicry, 277, 

 280; parasitism, 275, 277, 278; pre- 

 daceous habits, 277, 280, 282; reac- 

 tions of animals in, 284; relations of 

 animals to, 277; slavery, 275, 277, 

 280; society, 275, 277, 278; species 

 relations in, 277, 281; succession of, 

 287; symbiosis, 275, 277, 279 



Astacus fluviatilis, 140 



