INDEX 



Aardvark, 563 

 Abalonc, 326, ss3 

 Abdominal ca\'ily, 555 

 Abdominal fin, 462 

 Abdominalia, 374 

 Abdominal pores, 4S1 

 Abducens ncr\e, 471 

 Abiogencsis, 127 

 Abomasus, 568 

 Acanlhia, 428 

 Acanthias, 507 

 Acanthin, 176 

 Acanthobolhrium, 254 

 Acanthoccphala, 26S 

 Acanthocystis, 175 

 Acanthoderus, 39 

 Acanthoflidai', 507 

 Acanthometra, 177 

 Acanthoj)lcura, 315 

 Acanthojjleri, 510 

 Acanthopterygii, 511 

 Acaridx, 307 

 Acarina, 396 

 Accessory chromosome. 

 Accessory nerve, 471 

 Accipiter, 544 

 Acephala, 317 

 Acerata, 387 

 Acerenlomon, 419 

 Acetabulum, 248 

 Acha:ta, 281 

 Achatina, 336 

 Achoreutcs, 419 

 Achromatin, 56 

 Achthercs, 28, 370 

 Acineta, irfi 

 Acinetaria, 107 

 Acinous glands, 68 

 Acipenser, 50S 

 Acmsa, 333 

 Acontia, 226 

 Acrania, 439 

 Acridium, 421 

 Acris, 520 

 Acrodont, 529 



Ai.linaria, 231 

 Aclinophrys, 17^ 

 Acl,inopoda, 300 

 Aclinospha:rium, 173 

 Actinotrichia, 463 

 Actinotrocha, 2S7 

 Actinozoa, 224 

 Aculeata, 426 

 Aculeus, 413, 425 

 Acustic nerve, 471 

 Adambulacral plates, 296 

 Adamsia, 227 



Adductor muscle, 228, 318 

 /Ega, 3S6 

 /Egina, 2r8 

 /Eginopisis, 214 

 /Eolid.T, 335 

 /Eolidia, 335 

 /Epiornis, 542 

 /Equoria, 214, 218 

 ^schna, 420 

 /Esthetes, 315 

 /Ethaliura, 181 

 j^ After-shaft, 534 

 Agalmia, 219 

 Agamid:e, 529 

 Agelacrinoidea, 302 

 Agelacrinus, 303 

 Agkistrodon, 531 

 Aglaophenia, 218 

 Aglossa, 520 

 Aglypha, 531 

 Agrion, 420 

 Air bladder, 502 



cells, 482 



pipes, 53S 



sacs of birds, 538 

 AL-e, 408 

 Alae cordis, 412 

 Alauda, 544 

 Albatross, 543 

 Albuincn gland, 249 

 Alca, 543 

 AlcedinidfE, 544 

 Alces, 569 



581 



Alciopidce, 277 

 Alcyonaria, 230 

 Alcyonitke, 230 

 Alcyonidium, 287 

 Alcyonium, 227, 230 

 Alecilhal, 143 

 Aleppo evil, 1S4 

 Aletia 433 

 Alima, 376 

 Alisphcnoid, 45S 

 Allantois, 400 

 Allelomorphs, 138 

 Alligator, 532 

 AUigator turtle, S-7 

 AUobophora, 279 

 AUoposus, 347 

 Alosophila, 433 

 Alpaca, 569 

 Alpheus, 3S0 

 Alternation of generations, 



131 

 Altrices, 541 

 Alula, 534 



Alveolar duct, 482, 555 

 Alveoli, 4S2, 532 

 Amaroucium, 446 

 Aml:)ergris, 572 

 Ambh'opsida?, 510 

 Amblypoda, 570 

 Amblystoma, 27, 520 

 Ambulacral system, 11 1, 



292, 296 

 Ameiva, 52S 

 Ametabolous, 414 

 Amia, 32, 50S 

 Amicula, 316 

 Ammocoetes, 493 

 Ammonitida-, 346 

 Amnion, 414, 4S9 

 Amniola, 520 

 Amniotic fluid, 490 

 Amoeba, 53, 171, 172 

 Amoebina, T72 

 Amceboid motion, 53, in 

 Amphiaster, 60 



