INDEX 



383 



Crinoids, 99, 345. 



Crocodiles, 263. 



Crop, 85, 273. 



Crustacea, 124; economic importance 



of, 142 ; cliaracteristics 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, 366 ; 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 : sette, 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. 

 Egg-laying 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. 



Ferse, 323. 



Figs, cross fertilization of, 196. 



Finsof afish, 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. 



Fhes, 183 ; horse, 186. 



Flukeworms, 65. 



Food vacuoles of Amceba, 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, 

 366. 



