INDEX 



487 



274; of frog, 258, 261; of insect, 17; 



of lamprey eel, 269 ; of man, 408 ; of 



snail, 1 60; of spider, 114. 

 eyelashes, 409. 

 eyelid, 261. 

 eyespot, of Euglena, 224; of Planaria, 



183. 



falcon, 370. 



family, 104. 



fangs, 328. 



fat, 399. 



feathers, 339, 346, 377. 



feces, 219. 



feet, of birds, 337, 339. 



femur, 256 (see skeleton). 



fertilization, in earthworm, 173; in fish, 



276; in frog, 264; in Hydra, 203; in 



mammal, 410. 

 fever, dumdum, 229; recurrent, 229; 



relapsing, 229; Texas, 228; yellow, 



229. 



fig insect, 69. 

 Filaria, 181. 

 filoplumes, 347. 

 fingerling, 294. 

 fins, 271, 273. 

 fish, 7, 278-284 ; artificial propagation of, 



294; cave, 282, 283; deep sea, 283; 



flying, 282, 283; food, 288; food of, 



142 ; game, 285 ; hatching of, 295 ; 



lungs of, 284 ; phosphorescent, 283 ; 



relations to man, 285-298; relations 



to mussels, 152. 

 fishing industry, 293. 

 fission, of Hydra, 203. 

 flagella, of Euglena, 224 ; of sponge, 



211. 



flamingo, 367. 

 flatworms, 183-191. 

 flea, and bubonic plague, 98; cat and 



dog, 52, 53; house, 53; jigger, 52; 



water, 140, 141. 

 flesh, 256. 

 flounder, 288, 290. 

 fluke, liver, 186-1 88. 

 fly, bloodsucking, 100; Hessian, 35, 36; 



horse bot, 48 ; house, 73-85 ; ichneu- 

 mon, 71 ; ox heel, 50, 51; sheep bot, 



50 ; Spanish, 67 ; stable, 99, 100 ; 



tachina, 34, 71 ; tsetse, 99, 100. 

 flycatcher, 375, 380. 



food, of Ameba, 223; of birds, 348; of 



crayfish, 133; of earthworm, 171; of 



grasshopper, 13 ; of house wren, 378 ; 



of Hydra, 200; of Paramecium, 219; 



of reptiles, 332; of snail, 159; of 



starfish, 194. 

 food vacuole, 219. 

 foot, of mussel, 146 ; of snail, 159 ; of 



starfish, 193. 

 fox, 454-455; Arctic, 400; flying, 422; 



red, 423, 424. 

 frog, 245-267; bull, 302, 307; green, 



303 ; habitat of, 245 ; leopard, 302 ; 



movements of, 245 ; muscular activity 



of, 256; nervous system of, 256-261; 



physiological processes in, 246-254; 



reproduction of, 262 ; sense organs of, 



261 ; skeleton of, 254; tree, 303. 

 fry, 294. 

 fur, 455. 



gall, insect, 66, 67. 

 gallinule, 351, 357. 

 game, protection of, 466; slaughter of, 



462. 



ganglia, 17 (see nervous system), 

 gapes, 181. 

 gar pike, 280, 281. 

 gastral cavify, of sponge, 211, 213. 

 gastric, juice, 247 ; mill, 134. 

 gastrocnemius muscle, 256, 257. 

 Gastropoda, 158, 167. 

 gastrovascular cavity of Hydra, 199, 203. 

 geese, 366, 381. 

 gemmule, 212, 214. 

 genital gland, of mussel, 147, 151 (see 



reproduction), 

 genus, 104. 



geographical distribution, 416-418. 

 germ cells, of grasshopper, 18; of Volvox, 



232; continuity of, 232. 

 germ layer, 267. 

 germs of disease, 73, 74. 

 gestation, 410. 

 gibbon, 445, 447. 

 gid, 191- 



gila monster, 321, 322. 

 gill arches, 275. 

 gills, of crayfish, 134; of fish, 275; of 



frog, 266, 267 ; of lamprey eel, 269 ; 



of mussel, 147, 148, 149. 

 giraffe, 436. 



