INDEX. 



65 s 



AspUmchrM, 188. 



Astacus, 228. 



Astarte, 307. 



AeteriadcB, 153. 



AsterinidoRf 153. 



Asteroideti, 143, 144; general characters 

 of, 150; families of, 15'i; distribution 

 of, in space, 162 ; in time, 162, 163, 164. 



Asteroid Polypes, 125. 



Aatr(eid<B, 138, 140. 



Astrogonvwm, 164. 



Aatropecten,^ 151, 164. 



Astropectinidce, 153. 



AstrophydicB, 155. 



Astrophyton, 154. 



Ateles, 602, 6r3. 



.^eAerura, 589. 



AthxyrybiadcB, 99. 



Athyris, 296. 



^*iam«a, 319. 



Atlantidx, 316, 319. 



Atolls, 135, 136, 138. 



Atrial system (Brachiopodd), 275, 294. 



Atrium ^rttnicaffls), 289. 



Auchenia, 562. 



AuloporidcB, 140. 



Aulosteges, 297. 



Aurelia, 110. 



Aurelia, 256. 



jlwricBJa, 319. 



.ilurtcttiaWa, 160. 



.4i«ric«!idce, 317, 319. 



.4«es, 359 ; general characters of, 453 ; 

 feathers of, 454, 456 ; vertebral column 

 of, 456, 457 ; beak of, 457 ; pectoral 

 arch and fore-limb of, 458-462; liind- 

 limb of, 462-464 ; foot of, 463 ; digestive 

 system of, 464-466 ; respiratory system 

 of, 466, 467 ; circulatory system of", 

 468 ; nervous system and organs of 

 sense of, 470; reproductive system of, 

 469; migrations of, 472; divisions of, 

 472 ; orders of, 474-505 ; distribution of, 

 in time, 605-508. 



Avicula, 306. 



Avienlaria, 282. 284. 



AvicvlidcB, 306, 306. 



Avocet, 480. 



AxinvSt 306. 



Axolotl, 411, 412. 



Aye-Aye, 600. 



Baboow, 604. 



Babyroussa, 557. 



Bacteria, 36, 37. 



Saetrites, 338. 



BacuUtes, 833, 334, 335, 338. 



Badger, 679. 



Balcma, 545, 548. 



BalcEnidce, 545, 546. 



Balosnodon, 613. 



Balcenoptera, 648 



Balancers, 280, 264. 



Balamidce, 207, 211, 212, 218 ; distribution 



of, in time, 233.. 

 Balamws, 212, 213. 

 Balearica, 482. 

 Baleen, 545, 646, 647, 648. 

 Balistidce, 388. 

 Bandicoot, 634; 

 Banxring, 697. 

 Barricr-rctfa, 135, 136, 137, 138. 



Barnacles, 210, 211, 212, 213, 214. 



Basewnion, 433. 



Bathyiims, 11, 58. 



Balides, 397, 398. 



Batrachia, 413. 



Bats, 612, 613, 515, 526, S92, 598, 694. 



Bear, 677, 678, 616. 



Beaver, 589. 



Bee-eaters, 50O. 



Bees, parthenogenesis of, 32, 33 ; commun- 

 ities of, 268. 



Belemnites, structure of, 329. 



Belemnitidce, 329, 330, 336, 338. 



BelerrmiteUa, 335. 



BelemniteuthiSt 335. 



Belmwms, 234. 



BeUerophvna, 337. 



Bellerophon, 337. 



Belodon, 445. 



Beloptera, 335. 



Beluga, 392. 



Benturoug, 579. 



Bene, 133. 



BervidtB, 134. 



Bimcma, 526 ; general characters of, 608. 



Biology, definition of, 1, 



Bioplasm, 5. 



Bipes, 435, 437. 



Bipmrmria, 152. 



Bird-lice, 258. 



Birds of Prey, 501. 



Bird's-head process, 282. 



Birgitg, 231. 



Bison, 568. 



Bivalve Shell-fish, 300. 



Bladder, contractile, of Motif era, 182. 



BlastoicUa, 144 ; general characters of, 

 159 ; distribution of, in time, 163. 



Blattina, 260. 



Blmmdai, 387. 



Blind-worm, 437. 



Boa, 433. 



Boidae, 493. 



Bombidae, 269. 



Bonasa, 489. 



Bonellia, 186. 



Book-scorpion, 241. 



Bopyridte, 226. 



Bos, 668, 616. 



Boschas, 479. 



Botawus, 483. 



BothrioeephaluSj 167, 170. 



Botryllidce, 292. 



Botryllus, 290, 291. 



Bourguetwrinvs, 157. 



Bovidce, 665, 567, 615. 



Brachiopoda, 274, 276, 276 ; general char- 

 acters of, 292 ; shell of, 292, 293 ; arms 

 of, 294 ; ati-ial system of, 294 ; nervous 

 295 ; vascular system of, 295 ; divisions 

 of, 295 ; distribution of, in space, 298 ; 

 in time, 298 ; development of,'295. 



SracMima, 209. 



BrachymetopttSf 234. 



Brachywra, 208 ; characters ot, 231, 232 ; 

 development of, 232. 



Bracts, 95 (see Bydrophyllia), 



Bradypodiaae, 637, 611. 



Bradypus, 610, 638, 639. 



Bramatherium, 615. 



Branchial arches (Fishes), 367. 871. 



Branchial hearts (Cuttle-fishes), 324. 



