466 
Cervus, 304. 
Chara, 420. 
Charrin, 257. 
Chick, 57, 406. 
Child, 72. 
Chinese pheasants, 6. 
Chlorophyl, 9. 
Cicadas, 187, 188. 
Ciona, 148. 
Classification, 31-36. 
Classification, scheme of, 38. 
Cockatoo, 6. 
Colaptes, 310. 
Colias, 185. 
Colonial forms, 127. 
Color, 18, 19, 24, 133, 375+ 
Coloration, 5, 6, 7, 23, 357-360. 
Columba livia, 76. 
Comb of bees, 4. 
Communal marriages, 210. 
Competition, 104, 112, 119, 120, I21, 122,123. 
Compositz, 130. 
Cones, 310. 
Conklin, 72. 
Cope, 49, 259. 
Copridz, 183. 
Coral-snakes, 194. 
Correlated variation, 94. 
Correlation, 134. 
Cottus, I9I. 
Crab, 15, 248, 344, 354» 
Crickets, 188. 
Crocodiles, 193. 
Crosby, 398. 
Cross-fertilization, 21. 
Crossing of species, 148, 149, 150. 
Crystal, 29. 
Cryptocerus, 144. 
Ctenophors, 417. 
Cuckoo, 139, 140, 141. 
Cuénot, 427-428, 435. 
Culicidze, 188. 
Cunningham, 257-260, 
Cuvier, 44, 301. 
Cynocephalus, 209. 
Cypridopsis, 392-393. 
Cyprinodonts, 190. 
Cypris, 320. 
Dall, 260, 
Dallinger, 320. 
Danaids, 160, 
Dances, 195. 
Daphnia, 305, 418. 
Darwin, C., numerous references through- 
out the text. 
Darwin, Erasmus, 223, 
Lndex 
Date-palm, 313. 
Davenport, 264, 266, 321. 
Dean, 358. 
Death, 370. 
Death, feigning, 410, 411. 
Deer, 309. 
Degeneration, 165. 
Delamare, 257. 
Descent theory, 31-35, 
Desmarest, 206. 
Desmodium, 403. 
Dianthus, 149. 
Didelphys, 410. 
Dimorphism, 360. 
Dingoes, 314. 
Dinophilus 428. 
Diptera, 180, 188, 
Divergence of character, 127, 128, 
Dog, 226. 
Draba, 288, 289, 290, 292, 294. 
Draco, 194. 
Dragonet, IgI. 
Drill, 209. 
Ducks, 94, 314. 
Diising, 423. 
Dutrochet, 320. 
Earthworm, 380, 382, 383, 384, 417. 
Echidna, 54. 
Eciton, 144. 
Egerton, 204. 
Egg, 429-430, 432. 
Eggs, number of, 19. 
Egypt, animals of, 225. 
Egyptian remains of animals, 43, 44. 
Eimer, 158, 260. 
Eisig, 72. 
Electric organs, 22, 132, 372. 
Elephant, 110-111, 206, 304. 
Emu, 202. - 
Entoscolax, 353. 
Epihippus, so. 
Equus, 50. 
Eristales, 188. 
Esmeralda, 182. 
Euploids, 160. 
Eustephanus, 201, 
Evolution, 29. 
Ewart, 238. 
Exercise, 12. 
External conditions, 130, 
Eye, 13, 131, 132. 
Eye, evolution of, 131, 132, 
Eye, of flatfish, 137. 
Fayal Islands, 124. 
Felidae, 308. 
