686 



INDEX. 



A sinus, 585. 



Asiphonida (Lamellibranchiata}, 326, 327. 



AspergiVum, 329. 



Asplanchna, 201, 



Astacus, 247. 



Astarte, 32d. 



Asteriadw, 168. 



Asterinidx, 16-J. 



Asteroidea, 156, 157 ; general characters 

 of, 164; families of, it>8; distribution 

 of, in space, 18'J ; in time, ib2. 



Asteroid Polypes, 137. 



Astomata, 49. 



Asratidm, 150,152. 



Astrogonium, 182. 



Astropecten, 168, 182. 



Astropectinidie, 168. 



Astrophydia, 170. 



Astrophyton, 170. 



.AteZes, 33, t>3t. 



Athecata, 93. 



Atherura, 19. 



Athorybiad.e, 109. 



Atkyris, 316. 



Atlanta, 341. 



Atlantidce, 338, 341. 



Atolls, 149, 150. 



Atrial system (Brachiopodd), 294, 314. 



Atrium (Tunicata), 308. 



Xttcbem'a, 591. 



4ic/ojwid:e, 512. 



Aulosteges, 317. 



Aurelia, 120. 



Aurelia, 275. 



Auricula, 341. 



Auricularia, 178. 



Auriculidce, 339, 311. 



Autophagi, 46. 



-dues, 383: general characters of, 480; 

 feathers of. 48! ; vertebral column of, 

 4 S 3 ; b<?ak of, 4-J4 ; pectoral arch and 

 fore-limbof,485,ese<j' ; hind-limb of, 4t9, 

 e seg ; foot of, 490 ; digestive system of, 

 4^1 ; respiratory system of, 493 ; circula- 

 tory system of, 49 j ; nervous system and 

 organs of sense of, 497 ; reproductive 

 system of. 496 ; migrations of, 4^9 ; 

 divisions of, 499 ; orders of, 501, etseq ; 

 distribution of, in time, 53^, et i>eq. 



Av!cula, 327. 



Avicularia, 302, 304. 



Aviculidce, 326,327. 



Avocet, 507. 



Axinus, 327. 



Axolotl, 436, 437. 



Aye-Aye, 631. 



BABOON, 635. 



Babyroussa, 587. 



Bacteria, 3', 38. 



liactrites, 361. 



Baculites, 356, 357, 358, 361. 



Badger, 610. 



alct;na, 573, 576. 



Baltmide, 573, 676. 



Balcenoptera, 576. 



Balancers, 269, 284 



Balanidie, 226, 229, 231, 232; distribution 



of, in time, 253. 

 Balanus, 231,232. 

 Ba/earica, 510. 

 Baleen, 513, 574, 575, 5J. 



Balistide, 412. 

 Bandicoot, 562. 

 Banxring, 628. 

 Barrier-reefs, 148, 150. 

 Barnacles, 229, 231, 232. 

 Jjascanion, 458. 

 Jiathybius, 11, 64. 

 Bathycrinus, 180. 

 atides. 422, 423. 

 Batrachia, 438. 



Bats, 540, 541, 513, 554, 623, et sea. 

 Bear, 6 8, 609, 648. 

 Beaver, 620. 

 Bee-eaters, 528. 



Bees, parthenogenesis of, 32,33; communi- 

 ties of, 288 



Belemnites, structure of, 352. 

 Bdemnitidce, 35V, 3o7, 3(31. 

 Belemnitella, 358. 

 Belemniteuthis, 358. 

 Belinurus, 254. 

 Bellerophina, 359. 

 Bellerophon, 341, 359. 

 Belodon, 470. 

 Beloptera, 358. 

 Beluga, 417. 

 Benturong, 610. 

 Beroe, 146. 

 Beroidce, 146. 

 Bimana, 654 ; general characters of, 037. 



Biology, definition of, 1. 

 Bioplasm, 5. 



Bipes, 461, 462. 



Bipinnaria. 167. 



Bird-lice, 278. 



Birds of Prey, 528. 



Bird's-head process, 302. 

 Birgus, 249. 



Bison, 598. 



Bivalve Shell-fish, 321. 



Bladder, contractile, of Rotifera, 20n. 



Blastoidca, 157 ; general characters of, 

 176 ; distribution of, m time, 181. 



Blattina *8i>. 



Blennid<e, 411. 



Blind worm, 463. 



Boa, 458. 



Boide, 458. 



Bombidce, 288. 



Bonasa, 516. 



Bonellia, 204. 



Book-scorpion, 260. 



Bopyridce, 245. 



Bos, 598, 616. 



Boschas, 506. 



Botaurus, 510. 



Bothriocephalus, 185, 1SS. 



Botryllidce, 311. 



Botryllus, 310. 311. 



Bourgueticrinus, 174. 



BovidK, 596, 6t7, 616. 



Brachiopoda, 293, '294, 295 ; general char- 

 actei-s of, 312; shell of, ib ; arms of, 

 314; atrial system of, ib. ; nervous, 315; 

 vascular system of, ib. ; divisions of, ib. 

 distribution of, in space, 316 ; in time, 

 ib ; development of, 315. 



Brachiuna, 227. 



Brachymetopus, 253. 



Brachyura, 226; characters of, 249, 250 

 development of, 251. 



Bracts (see Hydrophyllia'), 105. 



