INDEX. 



605 



A uriculidce, 294, 296. 



Aurochs, 525, 566. 



Autophagi, 439. 



Aves, 337 ; general characters of, 423 ; 

 feathers of, 424, 425 ; vertebral column 

 of, 426, 427; beak of, 427; pectoral 

 arch and fore-limb of, 429, 431 ; hind- 

 limb of, 431, 432 ; foot of, 433 ; digestive 

 system of, 433-435 ; respiratory system 

 of, 436; circulatory system of, 437 ; ner- 

 vous system and organs of sense of, 439 ; 

 reproductive system of, 438 ; migrations 

 of, 441; divisions of, 441; orders of, 

 442 ; distribution of, in time, 467-470. 



Avicula, 284. 



Avicularia, 261, 263. 



Aviculidce, 2b3, 284. 



Avocet, 448. 



Axinus, 284. 



Axolotl, 385, 386. 



Aye-Aye, 553. 



BABOON, 556. 



Babyroussa, 517. 



Bacteria, 35, 36. 



Bactrites, 315. 



Baculites, 310, 311, 312, 315. 



Badger, 536. 



Balcena, 505, 506, 508. 



Balcenidce, 505, 507, 508. 



Halcenodon, 564. 



Balcenoptera, 508. 



Balancers, 235, 246. 



Balanidce, 198, 200, 201, 203 ; distribution 

 of, in time, 219. 



Balanus, 201, 202. 



Baleen, 505, 506, 507, 508. 



Balistidce, 363. 



Bandicoot, 495. 



Barrier-reefs, 129, 130, 131. 



Barnacles, 200, 2<)2. 



Bathybius, 10, 55. 



Batides, 373. 



Batrachia, 387. 



Bats, 474, 475, 477, 487. 



Bear, 531, 534, 535. 



Beaver, 544. 



Bee-eaters, 463. 



Bees, parthenogenesis of, 31, 32 ; commu- 

 nities of, 249. 



Belemnites, structure of, 307. 



Belemnitidce, 306, 307, 311. 



Belemnitella, 311. 



Belemniteuthis, 311. 



Belinurus, 220. 



Bellerophina, 313. 



Bellerophon. 296, 313. 



Belodon, 415. 



Beloptera, 312. 



Beluga, 368. 



Beroe, 127- 



Beroidce, 128. 



Bimana, 488 ; general characters of, 558. 



Biology, definition of, 1. 



Bioplasm, 4. 



Bipinnaria, 146. 



Bird-lice, 242. 



Birds of Prey, 464. 



Bird's-head process, 261. 



Bison, 526. 



Bivalve Shell-fish, 256, 278. 



Bladder, contractile, of Rotifera, 174. 



Blastoidea, 138 : "; general characters of, 

 152 ; distribution of, iu time, 156. 



Blattina, 244. 



Blenniidce, 363. 



Blind-worm, 410. 



Boa, 406. 



Boidou, 406. 



Bombidce, 250. 



Book-scorpion, 227. 



Bopyridce, 213. 



Bos, 525, 566. 



Bothriocephalus, 160. , 



Botryllidce, 270. 



Bourgueticrinus, 150. 



Bovidce, 524, 525, 565. 



Brachiopoda, 253, 254, 255; general charac- 

 ters of, 270-274; shell of, 271 ; arms of, 

 272 ; atrial system of, 273 ; nervous sys- 

 tem of, 273; vascular system of, 273; di- 

 visions of, 274, 275 ; distribution of. in 

 space, 276 ; in time, 276. 



Brachiuna, 199. 



Brachymetopus, 220. 



Brachyura, 214; characters of, 217; de- 

 velopment of, 217, 218. 



Bracts, 90 (see Hydrophyllia). 

 Bradypodidce, 498, 563. 

 Bradypus, 472, 499. 

 Bramatherium, 565, 569. 

 Branchial arches (Fishes), 345, 349. 

 Branchial hearts (Cuttle-fishes), 301. 

 Branchial sac (Tunicata), 267, 268, 269 ; 



(Lancelet), 354. 

 Branchiata ( Vertebrata), 337. 

 Branchifera, 290, 294. 

 Branchwgasteropoda, 283, 290. 

 Branchiopoda, 206. 

 Branchipstegal rays, 344. 

 Branchiostoma, 354 (see Amphioxus). 

 Branchipus, 207. 

 Brevilinguia, 409. 

 Brevipennatce, 444. 

 Bruta, 498 (see Edentata). 

 Bryozoa (see Polyzoa). 

 Bubalus, 526. 

 Buccinidce, 291, 294. 

 Buccinum, 291 294. 

 Buceridce, 460. 

 Buffalo, 526. 

 Bufonidce, 390. 

 Bulbus arteriosus, 350. 

 Bulimus, 296. 

 Bulla, 296. 

 Bullidce. 292, 296. 

 Bursaria, 71. .* 

 Bustards, 450. 

 Butterflies, 247. 

 Byssus (of LamelUbranchiata), 283. 



CACHALOT, 509. 



Caducibranchiata (Amphibia), 382, 383. 



Caeca, intestinal (of Birds), 435. 



Caeca, pyloric (of Fishes), 351. 



Cceciiice, 384. 



Caiman, 415. 



Calamaries, 306. 



Calcarea (Sponges), 63. 



Calceola, 275. 



CalceolidcK, 275. 



Calcispongice, 63. 



Calice (Corals), 115. 



Callianiridce, 128. 



