INDEX 



Major topics are shown in Bold Type, genera in italic, 

 and authors' names in Capitals and small capitals 



Aardvark, 704. 

 Acanthodii, 186. 

 Acanthopterygii, 237. 

 Accipiter, wing, 454. 

 Accommodation, see Eyes. 

 Acentrophorus, 235. 

 Aceratherium, 730. 

 Acipenser, 234. 

 Actinistia, 268. 

 Actinopterygii, 190, 228, 772. 

 Adapts, 614. 

 Adaptive radiation, 777. 



amphibia, 366. 



birds, 527. 



carnivora, 684. 



elasmobranchs, 175. 



lizards, 407. 



marsupials, 557, 568. 



snakes, 413. 



teleostei, 236, 244. 



tunicates, 69. 

 Adder, 416. 



Adelospondyli, 296, 361. 

 Adrenal 



actinopterygii, 207. 



amphibia, 301. 



dipnoi, 278. 



elasmobranchs, 165. 



lamprey, 98. 

 Aepyceros, 762. 

 Aepyornis, 514. 

 Agamids, 407. 

 Age, of rocks, 16. 

 Agnatba, 24, 83, 125, 772. 

 Agouti, 661. 

 Agriochoerus, 751. 

 Aigialosaurs, 409. 

 Ailuropoda, 686. 

 Ailnrns, 686. 

 Air bladder, 201, 217, 235, 244, 249, 



262, 272, 276, 280. 

 Air sacks, birds, 471. 



reptiles, 379. 

 Alarm substances, 221. 

 Alauda, 521. 

 Albatross, 460, 517. 

 Alburnns, 255, 280. 

 Alcedo, 521. 

 Alevins, 205. 

 Allantois, 381. 

 Alligator, 421. 

 Allometry, 599, 737. 



Allosaurus, 423. 

 Alopias, 182. 

 Alouatta, 621. 

 Alticamelus, 753. 

 Alytes, 341, 360, 365. 

 Amaroucium, 70. 

 Amblypoda, 716. 

 Amblyrhynchus, 408. 

 Ambystoma, 358, 365. 

 Amia, 199, 233, 235, 244, 262. 

 Ammocoete larva, 114. 

 Amnion, reptiles, 381. 

 Amniota, 371. 

 Amphibia, 296, 356, 362. 

 Amphicentrum, 231. 

 Amphignathodon, 332, 343. 

 Amphilestes, 547. 

 Amphioxides, 45, 46. 

 Amphioxus, 23. 

 Amphisbaena, 409. 

 Amphitherium, 548. 

 Amphiuma, 339, 358, 364. 

 Amphodus, 332. 

 Ampullae of Lorenzini, 172. 

 Amylase, amphioxus, 32. 



Ciona, 62. 

 Amynodonts, 687. 

 Anabas, 261. 

 Anableps, 214. 

 Anancus, 716. 

 Anapsida, 386. 

 Anaptomorphidae, 614. 

 Anas, 517. 

 Anaspida, 81, 127. 

 Anchitherium, 736. 

 Ancodonta, 748. 

 Ancylopoda, 731. 

 Angel fishes, 248. 

 Angler fishes, 237, 248, 253, 254. 

 Anguilla, 221, 226, 246, 249. 

 Anguis, 382, 409. 

 Ankylosaurs, 426. 

 Anolis, 408. 

 Anseriformes, 517. 

 Ant-eaters, Cape, 704. 



marsupial, 566. 



parallel evolution in, 593, 779. 



scaly, 601. 



spiny, 555- 



Xenarthra, 593. 

 Antelopes, 760. 

 Anthracotheres, 748. 



