498 



INDEX 



CorvidsE, 404. 



Cotton-worm, 45. 



Cow-bird, 406. 



Crab, burrowing, 142 ; spider, 109 ; 



swinrniing, 142. 

 Crab-spiders, 109. 

 Crane, .393. 

 Crane-flies, S7. 



Crayfisli, 12S ; distribution, 130. 

 Creeper, 413. 

 Crepidula, 218. 

 Cribella, 252. 

 Crielcet, 1, 20; cave, 20; external 



structure, 3 ; general form, 2 ; 



mole, 21. 

 Cricket-grasshopper, 20. 

 Crinoids, 238, 258. 

 Crocodiles, 351, 368. 

 Crop, of birds, 383 ; of cricket, 6 ; 



of Mollusca, 202. 

 Crossbill, 406. 

 Crotalidoe, 366. 

 Croton bug, 17. 

 Crow, 404. 

 Crow blackbird, 405. 

 Crustacea, 134, 281 ; abnormalities 



in, 151 ; anatomy of, 120 ; plijs- 



iology of, 120 ; regeneration of 



lost parts of, 149. 

 Cryptobranchidag, 339. 

 Ctenophora, 275. 

 Cuckoos, 399. 

 Cucumaria, 258. 

 Culicidte, 84. 

 Curculionidce, 71. 

 Currant-worm, 59. 

 Cursores, 391. 

 Cuticula, 3, 4, 30. 

 Cuttlefish, 220. 

 Cut-worm, 46. 

 Cuvier, 467, 469. 

 Cyclas, 230. 

 Cyclops, 158 ; rate of reproduction, 



158. 

 Cyclostomi, 322. 

 Cynthia moth, 43. 

 Cytology, 469. 



D 



Daddy-long-legs, 117. 

 Danaidee, .37. 

 Daphnia, 134, 153, 157. 

 Darters, 312. 



Darwin, Charles, 469, 470. 

 Darwin, Erasmus, 470. 

 Darwinism, 37, 470. 

 Decapods, economic importance of, 

 145. 



Deer, 444. 



Dermestidfe, 68. 



Dero, 172. 



Desmognathidae, 342. 



Desmognathus, 326, 342. 



Development, beetle, 62 ; crayfish, 

 148 ; effect of heat on, 453 ; of 

 light on, 453 ; frog's egg, 451 

 fly, 78 ; general laws of, 456 

 grasshopper, 15 ; Lepidoptera, 29 

 lobster, 146 ; mammals, 437 

 postembrvonic, of frog, 455 ; star- 

 fishes, 247 ; Urodela, 343. 



Devonian age, 12. 



De Vries, 428, 470. 



Diapheromera, 19. 



Didelphys, 441. 



Digestion (see Nutrition). 



Digger wasps, 52. 



Dimorphism, sexual, 113. 



Diplopoda, 100. 



Dipnoi, 303, 324. 



Diptera, 76-89. 



Discontinuous genera, 132. 



Disease-producing animals, 76. 



Distomum, 196. 



Diver-beetle, 65. 



Di"\nsion of labor, ph>'siologieaI, in 

 Cnidaria, 278 ; in Crustacea, 151. 



Dodo, 396, 418. 



Dog, 422, 446. 



Dolphins, 443. 



Domestic animals, e"\'olution of, 420. 



Dominant characters, 429. 



Dorsal, 2. 



Downy woodpecker, 401. 



Dragon-flies, 25. 



DrA'ness-lovers, 349. 



Duckbill, 439. 



Duckliill catfish, 324. 



Dytiscida;, 61, 65. 



Eagle, 396. 



Earthworm. 16S ; economics of, 171 ; 

 food of, 170 ; regeneration in, 170 ; 

 source of diseases, 172. 



Earwig, 17. 



Echidna, 439. 



Echinoderms, 238 ; anatomy of, 238 ; 

 musculature of, 244 ; ner\-ous 

 s^'stem of, 245 ; organs of circula- 

 tion, 243 ; excretion, 244 ; repro- 

 duction, 244 ; respiration, 242 ; 

 phj'siology of, 238 ; sense-organs 

 of, 245 ; water-vascular system of, 

 240. 



