INDEX 



705 



Appendicular skeleton, 495. 



A ppendicularia, 393, 



Appendix, vermiform, 638. 



Apse tides, 296, 297. 



Aptera, 337-338. 



Apteria, 578. 



Apterygijormes, 589, 598; Apteryx, 589, 

 598. 



Arachnida, 275, 276, 371-385. 



Araneida, 371-377. 



Arbacia, 190. 



Area, 262. 



Arcella, 39. 



Arch, gill, 437 ; hyoid, 437 ; visceral, 437. 



Archaean era, 697. 



Archaopteryx, 592, 593, 617, 694, 695. 



Archaomithes, 57s, 588, 593. 



Archenteron, 88, 89. 



Archiannelida, 215, 232-233. 



Archigetes, 165, 166. 



Archipterygium, 446. 



Arcliidm, 353. 



Ardca, 602; Ardeidce, 590, 602. 



Argonauta, 268, 269. 



Argulus, 294. 



Aristotle's lantern, 203, 204. 



Armadillium, 297, 301. 



Armadillo, 643, 660, 661. 



Aromochelys, 535, 541. 



Artcmia, 292, 293, 300. 



Arteries, 485, 486 (see circulatory system ) . 



Arthrobranchioe, 28).. 



Arlhropoda, 3, 24, 274-385; classifica- 

 tion, 275. 



Artiodactyla, 644, 667-671. 



Ascaridce, 173; Ascaris, 169, 170-173. 



Ascidiacea, 390, 391-393. 



Ascon, 99, 100. 



Asellus, 296, 297. 



Aspidiotus, 346, 347. 



Aspidobranchia, 258. 



Ass, 644, 671, 684, 701. 



Assimilation, 31. 



Astacus, 276, 284. 



Asterias, 189, 190 (see starfish). 



Asteroidea, 189, 198, 213. 



Astragalus, 497. 



Astrangia, 137. 



Aslropecten, 189. 



Astrophyton, 189, 201. 



Aslur, 606. 



Asymmetry, 252. 



Aides, 644, 664. 



Atheca, 535. 



Atoll, 138, 139. 



Atractaspis, 539. 



Atriopore, of Amphioxus, 394, 395: 



Tunieata, 391. 

 Atrium, 391, 397. 



yl«a, 369; Attidce, 377; v4tfi«, 376. 

 Attraction-sphere, 12, 13. 

 Auditory capsule, 416, 419; ossicle, 635 



640. 

 Auk, sgo, 607, 609. 

 Aurclia, 129, 130. 



Auricle, 406 (see circulatory system*. 

 Auriadaria, 211. 

 Aurochs, 684. 

 Aurophore, 126. 

 Autodax, 517. 

 Autolytus, 235, 236. 

 Autotomy, 198, 201, 290. 

 Aves, 401, 575-631, 694 (see bird) 

 Avicularia, 184. 

 Avocet, 607. 

 Axolotl, 516, 523. 

 Aye-Ayes, 662. 



Baboon, 644. 



Badger, 655. 



Balcenidce, 675. 



Balanoglossida, 386, 387 ; Balaiwglossus. 



214, 399, 693. 

 Balantidium, 71. 

 Balanus, 294, 295, 300. 

 Bahrini, 6;|5, 675, 676; Balwiwplera, 64A. 



675, 676. 

 Bandicoot, 642, 649. 

 Barnacle, 300. 

 Basal disk. 109, no, 134. 

 Basepterygium, 436, 437. 

 Basilarchia, 352. 

 Basilingual plate, 494. 

 Basipodite, 280. 



Bass, 444, 465, 466, 467, 475. 476. 

 Bats, 642, 643, 650, 651. 

 Bdellostoma, 414, 420. 

 BdMoura, 156. 



Beak, of pigeon, 576; of turtle, 529, 53c*. 

 Bears, 652, 654-655- 

 Beaver, 643, 658, 659. 

 Bees, 36 i, 366, 367. 

 Beetles, 337, 347. 360-364. 

 Behavior, of Amcba, 33; crayfish, 29c 



2 Z 



