INDEX 



Aljdomeu of spider, 147. 



Aboniasuni, 321. 



Aboral surface, 90. 



Adaptations to surroundings, 351:. 



Agassiz, Louis, 379. 



Aggressive resemblances, 3.57. 



Alligators, 263, 264 ; cliaracteristics 

 of, 265. 



Alpacas, 322. 



Alternation of generations in Aurelia 

 and campanularian hydrrjid, 60. 



Amblystonia, 239. 



Ambulacral grooves, 90. 



Ambulacral spines, UO. 



Amceba, 10, 13, 360 ; structure of, 14 ; 

 locomotion of, 14 ; manner of eat- 

 ing, 15 ; elimination of waste mat- 

 ter, 15; breathing of, 10; sensation, 

 16. 



Amphibia, 229 ; r-haracteristics of, 

 241 ; adaptations of, 242 ; relation- 

 ships of, 243 ; economic importani'c 

 of, 244 ; classification of, 245. 



Anaconda, 251. 



Animals, similarity of, to plants, s, 9 ; 

 beginning of, 19 ; growth of, 21 ; as 

 inachincs, 23 ; classification of, 24, 

 28 ; distribution of, 371. 



Annulata, 75 ; classification of, S.S. 



Anopheles, 184. 



Ant-eater, spiny, 312. 



Antennae, 157. 



Ants, 188, 189. 



Aortic arches of earthworm, 81. 



Apteryx, 292. 



Arachnida, 144 ; economic impor- 

 tance of, 152 ; characteristics of , 152. 



Archean, 342. 



Aristotle, 374. 



Armadillos, 315. 



Arthropoda, 124. 



Asexual reproduction, 362. 



Atoll, 5S. 



Auks, 280 ; great, 280 ; nesting hab- 

 its of, 293. 

 Aurelia, 52 ; life history of, 53. 

 Axolotl, 244. 



Baboon, 333. 



Baer, Karl Ernst von, 378. 



Baleen, 317. 



Barbs, 271. 



Barbules, 271. 



Barnacles, 135. 



Basihsks, 375. 



Bats, 331; fruit-eating, 332; vam- 

 pire, 332. 



Bears, l:)lack, :-i24 ; grizzly-, 325. 



Beavers, 328. 



Bees, 188 ; small carpenter, 193 ; 

 large carpentia', 193 ; leaf-cutter, 

 193; liumlilcbee, 193. 



Beetles, 1S6; Colorado potato, 187; 

 May, 187. 



Bilateral symmetry, 76. 



Bipirmaria, lOt). 



Birds, 268; characteristics of, 292; 

 molting of, 292 ; incubation of, 292; 

 nesting habits of, 293 ; migration 

 of, 295 ; adaptations to environ- 

 ments, 296 ; economic importance 

 of, 297; classification of, 299; 

 fossil, 350. 



Bisexual reproduction, 363. 



Blastophaga, 196. 



Blister beetles, 188. 



Blowfly, 186. 



Blow hole, 318. 



Blubber, 318. 



Bluejay, 291. 



Boa constrictor, 251. 



Bobwhite, 286. 



Bonnet, 377. 



Bowfin, 217. 



Brachiolaria, 100. 



Brachiopods, 344. 



381 



