4 8 4 



INDEX 



beaver, dam, 433 ; family, 432. 



beche-de-mer, 197. 



bee, and flowers, 4. 



beehive, 64, 65. 



beetle, Australian lady-bird, 70, 71 ; 

 blister, 67 ; burying, 67 ; carpet, 60 ; 

 cucumber, 39; diving, 25; elm-leaf, 

 46, 47 ; ground, 69 ; mealworm, 59, 

 60; potato, 35-38, 37; scarab, 68; 

 tiger, 69; vedalia, 71; whirligig, 25. 



bighorn, 439, 440. 



bile, 247. 



binary division, of Ameba, 223 ; of Para- 

 mecium, 221. 



Biological Survey, United States, 390, 

 466. 



birds, 7; altricial, 357, 359; anatomy 

 of, 340, 348 ; ancient, 361 ; as de- 

 stroyers of injurious animals, 377-380; 

 attracting, 391-397; baths for, 392; 

 beaks of, 338; beneficial, 378-380; 

 call notes of, 349; commercial value 

 of, 376-377; destruction of, 382-389; 

 diving, 364; domesticated, 380-381; 

 eggs of, as food, 376 ; feeding on moths, 

 45 ; feet, 337, 339 ; flightless, 363 ; 

 game, 369, 376; houses for, 393-397; 

 insectivorous, 380; land, 369; mating 

 of, 354; migration of, 350; natural 

 enemies of, 390; nest-building of, 

 354; of prey, 369; perching, 374; 

 precocial, 357, 359; protection of, 

 382-397 ; relations of, to man, 376 

 381 ; shore, 367 ; skeleton of, 335, 336 ; 

 songs of, 349 ; structure of, 335~349 ; 

 water, 364 ; wings of, 335. 



bisexual reproduction, 262. 



bison, 439, 462. 



bittern, 350, 357, 366. 



bivalve, 147 (see mussel). 



blackbird, 375, 379, 380. 



blackhead, 152. 



bladder, of frog, 247, 252. 



blood, of crayfish, 134; of grasshopper, 

 14-15 (see circulation). 



blood corpuscle, 14. 



bloodsucker, 175. 



bluebird, 373, 383 ; feeding young, 395 ; 

 house for, 305-396. 



bluegill, 287. 



blue jay, 353. 



blue racer, 325. 



boa constrictor, 326. 



body cavity, of alligator, 331 ; of earth- 

 worm, 174; of man, 402. 



body cells, of Volvox, 232. 



bone, 254 (see skeleton). 



brain, of dog, 407; of earthworm, 172; 

 of frog, 258, 259; of grasshopper, 12, 

 17; of lamprey, 269; of man, 407; 

 of mussel, 147, 150; of Planaria, 184 

 (see nervous system). 



branchial filaments, 275. 



Branchipus, 140, 141. 



breathing pores, of grasshopper, 15. 



bristles, of earthworm, 169, 170. 



brittle star, 195. 



budding, of ccelenterates, 206; of 

 Hydra, 199, 200, 203; of sponges, 212. 



buffalo, 462. 



bug, bed, 99, 100; green, 35, 36; pill, 

 129, 141 ; sow, 129, 141 ; tumble, 67, 

 68. 



bullhead, 283. 



Burs aria, 231. 



butcher bird, nest, 346. 



butterfly, cabbage, 38; milkweed, 31. 



byssus, 152. 



Calcarea, 217. 



calciferous glands, 171. 



camel, 436, 450. 



canals, of sponges, 213-214. 



canine teeth, 405. 



capillaries, of frog, 249. 



carapace, of lobster, 131. 



Carchesium, 231. 



caribou, 415, 437. 



carnivorous animals, 405, 424-430. 



carp, 280, 281. 



cartilage, 243, 254. 



castings, of earthworm, 171, 173. 



cat, 428-429, 451 ; as destroyer of birds, 



387; flea of, 52, 53; wild, 428. 

 catamount, 428. 



caterpillar, 20 ; celery, 39 ; tent, 46. 

 catfish, 281, 283. 

 cattle industry, 450. 

 cell, 202, 240, 243. 

 cell division, 263, 264. 

 cement, 404, 405. 

 centipede, 82, 128, 129. 

 Cephalopoda, 158, 165-167. 

 cephalo thorax, 131. 



