450 



ANIMAL STUDIES 



Archceopteryx lithograpMca (illus.), 



431. 



Arctic realm, 441. 

 Ardea herodias, 222 ; Ardea viris- 



cens, 222. 



Argynniscybele (illus.), 143. 

 Ariolimax, 98. 

 Armadillos, 443. 

 ArnitJiorhynchus paradoxus (illus.), 



237. 



Arthrodire (illus.), 425. 

 Arthropoda, 19. 

 Arthropods, 109, 130. 

 Articulata, 19. 

 Artificial propagation, 406. 

 Ascidians, 162. 

 Asclepias, 268. 

 Astacus (illns.), 117. 

 Asterias ocracea (illus. ), 151. 

 Astrophyton (illus.), 153. 

 Ateles, 250. 

 Aua, 333. 

 Auks, 217. 



Australian duck-mole (illus), 237. 

 Australian realm, 445. 

 Axoloti (illus.), 190. 

 Aythya (illus.), 302 



Band worms, 87 (illus.), 88. 



Barnacles (illus. 113), 112, 115 ; meta- 

 morphosis of (illus.), 275. 



Barriers, effect of, 439. 



Bascanion constrictor (illus.), 195. 



Basilarchia archippus, 365. 



Basket-star (illus.), 153 



Bassalian fauna, 446. 



Bats, 242. 



Beavers, 331. 



Bees, 142. 



Beetles, 140. 



Bell animalcule, 27. 



Birds, characteristics of, 209 ; molt- 

 ing, 210 ; skeleton of, 212 ; inter- 

 nal structures, 213 ; anatomy of 

 (illus.), 213 ; digestive system, 214; 

 nesting habits, 215 ; classification, 

 217 ; prcecocial (illus.), 302, 305; 

 mltridal (illus.), 303, 305 ; extinct, 

 419. 



Bison americanus, 246. 



Blacksnake (illus.), 195. 



Blastula (illus., 36), 35. 



Blindfish (illus.), 173. 



Blunt-nosed salamander (illus.), 18& 



Bob-white, 225. 



Bonasa umbellus, 225. 



Bony fishes, 170; dissection of 



(illus.), 178. 

 Box-turtle (illus.), 197. 

 Brain or sensorium, 388. 

 Brachiopods (illus., 86), 87. 

 Bradypus (illus.), 236. 

 Branchiostorna, 166; B. calif orni* 



ense (illus.), 167. 

 Branchipus (illus., Ill), 110. 

 Branta canadensis, 211 ; B. berni* 



da, 221. 



Brittle or serpent-stars (illus.), 152. 

 Brown pelican (illus.), 292. 

 Bubo virginianus, 227. 

 Buffalo, 246. 

 Bugs, 137. 



Bumble bees, 324 (illus.), 32a 

 Buteo borealis, 226 ; B. lineatus, 226. 

 Butterfly, 226 ; larva of (illus.), 270; 



chrysalid of (illus.), 354. 



Cabbage-butterfly, 367. 

 Calcolynthus primigenius (illus.) 



39. 



Calf, tongue of (illus.), 376. 

 California barn-door skate (illus.), 



305. 



California lancelet Ullus.), 167. 

 California quail (illus.), 224. 

 California woodpecker (illus.), 294, 



295. 



Calypte anna (illus.), 231. 

 Cambrian trilobites (illus.), 428. 

 Camponotus sp. (illus.), 320. 

 Canadian skipper butterfly, 436. 

 Cancer productus (illus.), 120. 

 Canis latrans, 248; C. M&tfw*,248; 



C. familiaris, 248. 

 Caprdla (illus.), 122. 

 Carnivora, 246. 

 Carpenter-bee, nest of (illus.), 825k 



