488 



INDEX 



gizzard, of bird, 348; of earthworm, 171. 



gland, ductless, 253 ; of frog, 252 ; mam- 

 mary, 419 ; mucous, 253 ; poison, 253 ; 

 salivary, 253 ; sebaceous, 399, 400, 

 407 ; sweat, 407. 



glandular cells, of Hydra, 201, 203. 



glass "snake," 322,323. 



Globigerina, 225, 226. 



glochidium, 151, 152. 



gnawing animals, 405. 



gnu, 439. 



goat, 418, 439, 450, 451. 



Goniobasis, 162. 



gopher, pocket, 433, 434; striped, 431. 



Gordius, 178. 



gorilla, 446. 



goshawk, 388. 



Grantia, 213. 



grasshopper, 8-23 ; blood of, 15 ; cir- 

 culation in, 14; digestion in, 13; ex- 

 cretion in, 15; food of, 13; habitat 

 of, 9 ; legs of, 10 ; locomotion of, 9 ; 

 metamorphosis of, 19; nervous sys- 

 tem of, 17; protection of, 16; rela- 

 tions to man, 20; reproduction of, 18- 

 19; respiration in, 15; sense organs 

 of, 16; wings of, 9-10. 



ground hog, 432. 



grouse, 365. 



growth, 241. 



grub, 20. 



guanaco, 450. 



guinea fowl, 381. 



gull, 365. 



gullet, of Euglena, 224 ; of Paramecium, 

 219. 



habitat, aerial, 2 ; fresh-water, 3 ; law 

 of, 416-417; of Hydra, 200; of 

 mammals, 398 ; parasitic, 3 ; sea 

 water, 3 ; terrestrial, 2. 



haddock, 289. 



haemoglobin, 248. 



hair, contour, 400; of insects, 16; of 

 mammals, 399, 400; woolly, 400. 



hake, 289. 



halibut, 288. 



Harvey, 248. 



harvestman, 118. 



hawk, 388, 467 ; chicken, 379 ; Cooper, 

 379; hen, 379; red-tailed, 347, 355, 

 356, 357, 379 ; roughleg, 379. 



hearing, of grasshopper, 17 (see ear, and 

 sense organs). 



heart, of bird, 348; of crocodile, 331 ; of 

 frog, 249; of grasshopper, 12, 15; of 

 insect, 14 ; of lamprey eel, 269 ; of 

 mammal, 406; of turtle, 311 (see cir- 

 culation). 



hellbender, 300. 



Hemiptera, 108. 



hen, 380. 



herbivorous animals, 405. 



hermaphroditic animals, 185, 262. 



heron, great blue, 364, 367 ; snowy, 384. 



herring, 288. 



hibernation, of Amphibia, 305 ; of mam- 

 mals, 413-414. 



highways, law of, 417. 



Hirudo, 175. 



holophytic nutrition, 224. 



holozoic nutrition, 224. 



HominidcE, 447-449. 



Homo, 447. 



honeybee, 63-64 ; colony of, 205 ; legs 

 of, 27-29. 



honeycomb, 64, 65. 



honeydew, 42. 



hoof, 401. 



hookworm, 179, 182. 



hopperdozer, 22. 



horns, 401. 



horse, 441, 450; botfly of, 48, 49; clas- 

 sification of, 104. 



house fly, 73-85 ; breeding habits of, 80 ; 

 control of, 80-83 ; distributor of dis- 

 ease germs, 73-85; enemies of, 81 ; 

 foot of, 75 ; germs carried by, 77 ; 

 maggot of, 80, 81 ; mouth parts of, 76 ; 

 proboscis of, 76 ; pupa of, 80, 81. 



humerus, 255. 



hummingbird, 373 ; egg of, 354. 



Huxley, 5. 



hyaena, 424, 425. 



hydatid, 190, 191. 



Hydra, 198, 199-2O4; anatomy of, 199; 

 cells of, 201 ; digestion in, 203 ; ecto- 

 derm of, 202 ; entoderm of, 202 ; habi- 

 tat of, 200 ; nematocysts of, 200 ; pro- 

 tection of, 200; regeneration of, 204; 

 reproduction of, 203. 



hydrophobia, 228. 



Hydrozoa, 210. 



Hymenoptera, 109. 



