INDEX 



383 



Crinoids, 99, 345. 



Crocodiles, 263. 



Crop, 85, 273. 



Crustacea, 124 ; economic importance 



of, 142 ; characteristics of, 143 ; 



classification of, 197. 

 Ctenophora, 60. 

 Cud, chewing, 321. 

 Culex, 185. 

 "Curculio, 188. 

 Cuttlefish, 119. 

 Cuvier, 378. 

 Cyclops, 135. 

 Cyst, 66. 

 Cytoplasm, 12. 



Diaphragm, 307. 



Darwin, Charles, 378, 379 ; Erasmus, 

 379. 



Digestion of animals, 361. 



Dimorphism, 60. 



Dispersal of animals, means of, 367 ; 

 barriers to, 368. 



Distribution, geographical, of animals, 

 365 ; questions of, 365 ; as reveal- 

 ing history of the earth, 373. 



Doves, 287. 



Dragon flies, 173. 



Duckbill, 311. 



Ducks, 283 ; mallard, 283 ; canvas- 

 back, 283 ; eider, 283. 



Dugongs, 318. 



Eagles, 285, 286. 



Earthworm, 75 ; external features, 75 ; 



diagram of body, 76 ; structure of 



walls, 77 ; setae, 78 ; movement, 77 ; 



digestive system, 79 ; digestion, 80, 



358 ; circulation, 80 ; nerves, 82 ; 



senses, 82 ; food, 83 ; life history, 



84 ; habits, 84. 

 Echinodermata, 89 ; classification of, 



102 ; economic importance of, 101 ; 



characteristics of, 101 ; digestion of, 



360. 

 Ectoderm of Hydra, 47. 

 Ectoplasm of Amoeba, 14. 

 Edentates, 314. 



Eels, 222 ; electric, 223 ; mud, 238. 

 Egg cells, 19. 

 Egg, defined, 19. 

 Eggrlaying mammals, 311. 



Eggs of mosquitoes, 185. 



Elephants, 322. 



Endoderm of Hydra, 47. 



Endoplasm of Amoeba, 14. 



Ephyra of Aurelia, 54. 



Epiglottis, 307. 



Epithelium cell, 10 ; of earthworm, 77. 



Eras of the earth, 341. 



Esophageal collar of earthworm, 82. 



Eyes of locust, 157; of perch, 208. 



Excretion of animals, 362. 



Family, 26. 



Faunal areas, 371. 



Fauna of a region, 370. 



Feathers, 270, 271, 292 ; thread, 270 ; 

 contour, 270 ; down, 270. 



Feather stars, 99. 



Ferae, 323. 



Figs, cross fertilization of, 196. 



Fins of a fish, 209. 



Fish, how it swims, 214. 



Fishes, 204, 208 ; bony, 218 ; anadro- 

 mous, 220; flying, 221 ; blind, 222 ; 

 lung, 223 ; characteristics of, 224 ; 

 adaptations of, 225 ; economic 

 value of, 226 ; classification of, 228 ; 

 fossil, 344. 



Fisheries, cod, 227 ; herring, 227 ; 

 salmon, 227 ; mackerel, 227. 



Fission of Amoeba, 16. 



Flagellum, 37. 



Flatworms, 64. 



Flies, 183 ; horse, 186. 



Flukeworms, 65. 



Food vacuoles of Amoeba, 15. 



Foraminifera, 30. 



Fossils defined, 341.— 



Frogs, green, 229 ; eyes, 230 ; ears, 

 230 ; respiration of, 230 ; locomo- 

 tion of, 231 ; alimentary canal, 232 ; 

 circulation of, 232 ; . food, 233 ; 

 reproduction of, 233 ; habits of, 

 235 ; wood, 240. " 



Function, relation of, to structure, 22. 



Ganoids, 217, 223. 

 Gastric follicles, 362. 

 Gasteropoda, 114. 

 Genus explained, 25. 

 Geographical distribution of animals, 

 866. 



