INDEX 



519 



Atavism, 461, 478. 



. Ite/es, 408. 



Ateuchus (Scarabceus, sacer, 219. 



Atlantosaurus, 427. 



Atlas, of Mammalia, 357. 



Atrial pore, of AmpAioxus, 268; of Tuni- 



cata, 265. 

 Atrium, of Ampkioxus, 269 ; of Tunicata, 



265. 

 Auc /tenia, 382. 



Auditory meatus, of birds, 332. 

 Augustine, 496. 

 Auks, 350, 351,438. 

 Aurelia aurita, 80, 81. 

 Auricle, of dogfish, 277; of frog, 301; of 



lamprey, 273; of pigeon, 333 ; of roach, 



286; of t: out, 288. 

 Australian region, 454. 

 Autolytus cornutus, 138. 

 Automatic behavior, 487. 

 Aves, 326. 



Avicularia, 129, 130. 

 Axial skeleton, of Mammalia, 357. 

 Axis, of Mammalia, 357. 

 Axis deer, 383. 

 Axolotl, 304. 

 Aye-aye, 406. 



Baboon, 409, 454. 



Backbone, 270. 



Bacon, 499. 



Bacteria, 6, 14. 



Badgers, 399. 



Baer, von, 507. 



Balcena mystecetus, skull of, 376. 



Balceniceps rex, 330. 



Balanoglossus, 261, 263, 447. 



Balanus, 158. 



Baldheaded eagle, 345. 



Baleen whales, 375. 



Banded rattler, 320. 



Bandicoots, 367. 



Barbels, of catfish, 289 ; of sturgeons, 284. 



Barnacles, 156, 450. 



Barren ground musk ox, 383. 



Barriers, to migration, 456, 469. 



Basement membrane, definition of, 51. 



Basi-hyal, of frog, 300, 301 ; of trout, 288. 



Basilarchia arckippus, 465. 



Basi-occipital, of trout, 288. 



Basket fishes, 93, 94. 



Basking shark, 280. 



Bastard wing, of duck, 329. 



Bathybius, 449. 



Bathymetrical distribution, 444. 



Batrachia, 304. 



Bats, 394-397, 452, 457. 



Bay porpoise, 375. 



Beach-fleas, 163. 



>, voyage of the, 508. 

 Beaks, ot birds, 330. 



animalcules, 187. 

 Bears, 398, 441, 453, 454, 457. 

 Beasts of prey, 397. 



ers, 387, 453. 

 Bedbug, 210. 

 Bedbug hunter, 210. 

 Beech tree blight, 208. 

 Bee-eaters, 348. 

 Beef tapeworm, 115, 116. 

 Bees, 225, 227. 

 1 leetles, 218, 227. 

 Behavior of animals, 480. 

 Belemnites, 425. 

 Bclostoma, 209, 210. 

 Benthos, 451. 

 Bible of Nature, 498. 

 Bile duct, of frog, 301 ; of pigeon, 333. 

 Biogenesis, 499. 

 Biogenetic law, 473. 



Biology, definition of, 3, 512; relation to 

 other sciences, 7, 514 ; when first used, 



5°4- 

 Binomial nomenclature, 9. 

 Bionomics, definition of, 514. 

 Biorlitza aptera, 223; B. renum, galls of, 



223. 

 Bipalium, 106. 



Biramous appendage, definition of, 147. 

 Bird lice, 202, 227. 

 Birds, 326, 432, 436, 448, 45 I ~454- 

 Birds of paradise, 355, 454. 

 Birds of prey, 343-348. 

 Bird spider, 184. 

 Bison, 384. 

 Bitterns, 342. 

 Bivalve Mollusca, 242. 

 Bivium, 90. 

 Black bass, 294. 

 Black bear, 398. 

 Blackbirds, 355. 

 Blackfish, 293. 

 Black-footed ferret, 399. 

 Black howler, 409. 

 Black rattlesnake, 319, 320. 

 Black snake, 317. 

 Black-spotted trout, 292. 

 Black swallower, 295. 

 Bladder-worm, 112, 115. 

 Blainville, de, 505. 

 Blake, voyage of the, 511. 

 Blastodermic vesicle, 309. 

 Blastoidea, 89, 421, 423. 

 Blastopore, of trochosphere, 232. 

 Blastostyle, 63. 

 Blastula, 58, 59, 473. 

 Blindworm, 313. 

 Blood, of Mammalia, 361. 



