414 



INDEX. 



Chordata, 274 



Chromosomes, 87 



Cicada, 252 



Cilia, 89 



Circulation, and the circulatory 



organs, 77, 82, 83, 199, 218, 



219, 285, 286, 297, 308, 324 

 Clam, 217, 223 

 Cleavage, 104 

 Coelenterates, 19, 22, 171 

 Ccelom, 113, 198 

 Cockroach, 243 

 Cocoon, 1 06 

 Coleoptera, 262 

 Colonies, 133, 176 

 Commensalism, 137 

 Communities, 135 

 Competition, 136, 139 

 Conditions of life, 125 

 Connective tissue, 116 

 Convolutions of the brain, 363, 



364 



Corals, 181, 183 

 Cormorants, 329 

 Corpuscles, 76, 83 

 Crabs, larvae, 238 



adult, 239 

 Cranes, 331 

 Crayfish, 66, 233 

 Crickets, 243 

 Crocodiles, 313 

 Crow, 337 

 Ctenophores, 181 

 Cyclops, 241 



Daphnia, 241 



Definition of Groups: Protozoa, 

 161; sponges, 148; ccelenter- 

 ates, 183; annulates, 203; 

 echinoderms, 213; mollusks, 

 227; arthropods, 265; verte- 

 brates, 274; fishes, 294; am- 

 phibians, 296; reptiles, 315; 

 birds, 340; mammals, 343 



Dero, 197, 198 



Development, 103, 104, 105, 113, 

 199, 212, 262, 279, 289, 299, 

 314, 324, 368, 380 (see also 

 Evolution, Metamorphosis, 

 etc.) 



Devil fish, 230 



Differentiation, 106, 113 

 Digestion and digestive organs, 



77, 78, 79, 198, 208, 218, 287, 



323, 348 

 Dipnoi, 292 

 Diptera, 244 

 Dispersal, 377 

 Distribution of animals, 374; of 



man, 370 

 Dog family, 355 

 Domestication of animals, 404 

 Doves, 334 

 Dragon-flies, 251 

 Duck-bill, 350 

 Ducks, 329 



E 



Eagles, 333 

 Earthworm, 196 



Ecology, 4, 912, 124150, 167, 

 182, 222, 263, 299, 314, 338, 



347- 369 



Economic relations, 2, 8, 14, 17, 

 396-408; protozoa, 160; 

 sponges, 1 68; corals, 183; 

 worms, 187, 189, 194; mol- 

 lusks, 224; insects, 246, 264; 

 fishes, 292; amphibians, 301; 

 reptiles, 314; birds, 339; mam- 

 mal, 349 (see also Supple- 

 mentary Exercises) 



Ectoderm, 104, 107 



Education, 368 



Embryo, 101 (see Development) 



Embryology, 4, 101, 387, 388 



Entoderm, 104, 107 



Environment, 108, 124, 393 



Epithelium, 115 



Ethnography, 372 



Evolution, definition, 380; evi- 

 dences for, 379; factors in, 

 391 ; human, 395 



Excretion, 78, 84, 85, 199 



Excursions, 10 



Experiments, essentials of, 58 



Eyes, 222, 261, 367 



Faunas, 374, 375, 378 

 Feet, 366 



