INDEX. 



Every reference is to the page. In some cases the upper and lower half of 

 the page is indicated by a small number, ] or 2 , placed above the number of the 

 page. Figures in black type refer to the systematic position. Figures in 

 italics refer to an illustration. 



Aardvark, 549 1 . 

 Abastor, 367 2 . 

 Abderitidae, 538 1 . 

 Abdimia, 4612. 

 Abdominal fin, 185. 

 Abdominal pores, Chel- 



onia, 410 ; Crocodilia, 



379 ; Dipnoi, 249 ; 



Elasmobranchii, 120 ; 



fishes, 90 ; Marsipo- 



branchii, 112; Tele- 



ostei, 208. 

 Ablabes, 367 2 . 

 Ablabophis, 366 2 . 

 Ablepharus, 354 1 . 

 Abrarais, 220 2 . 

 Abrocoma, 635 1 . 

 Abrostomus, 219 2 . 

 Acalyptophis, 370 l . 

 Acanthaphritis, 243 2 . 

 Acantharchus, 234 1 . 

 Acanthias, 126. 152 1 . 

 Acanthicus, 222 1 . 

 Acanthistius, 235 1 . 

 Acanthobrama, 220 2 . 

 Acanthocybium, 238 2 . 

 Acanthodactylus, 353 1 . 

 Acanthodes, 146, 147. 

 Acanthodii, 146. 

 Acantholabrus, 237 2 . 

 Acanthonus, 244 2 . 

 Acanthophis, 370 l . 

 Acanthophthalmus, 



221i. 



Acanthopsis, 22V. 

 Acanthopterygian, 185. 

 Acanthopterygii, 233. 

 Acanthorhodeus, 220 '. 

 Acanthosaura, 350 1 . 

 Acanthurus, 237 i . 

 Acanthyllis, 473'. 

 Acara, 237 2 . 



Ace. = accessory. 

 Accentor, 475 2 . 

 Accipiter, 463 2 . 

 Accipitres, 483 1 . 

 Acentrophorus, 176, 



179. 



Accra therium, 601 2 . 

 Acerina, 234 2 . 

 Aceros, 471 2 . 

 Acestra, 222 '. 

 Achaenodon, 582 1 . 

 Achalinus, 366 2 . 

 Achilognathus, 220 1 . 

 Achirus, 240 2 . 

 Acipenser, 168, 169, 



170 ; pericardium, 85. 

 Acomus, 465 2 . 

 Acomys, 634 1 . 

 Aconaemys, 635 1 . 

 Acontias, 354 1 . 

 Acrania, 11. 

 Acris, 311 1. 

 Acrobates, 536 2 . 

 Acrochilus, 220 1 . 

 Acrochordonichthvs, 



221 2 . 



Acrochordus, 366 2 . 

 Acrodont, 343. 

 Acrodus, 151 *. 

 Acronurus, 237 1 . 

 Acropoma, 234 2 . 

 Acrosaurus, 334. 

 Acrotus, 231 2 . 

 Acryllium, 465 1 . 

 Actinotrichia, 54. 

 Actitis, 467'. 

 Acustico-lateralis, 75, 



76. 



Adapis, 653 1 . 

 Adapisoricidae, 640 2 . 

 Adaptive reduction, 



579. 



Addax, 591 1. 



Adeciduata, 520. 



Adipose fin, 185. 



Adjutant, 46 1 2 . 



Adrenals, 442. 



Aegaeonichthys, 246 *. 



Aegialitis, 467 *. 



Aegithalus, 477 1 . 



Aegithognathous, 430. 



Aegotheles, 472 2 . 



Aelurichthys, 221 2 . 



Aelurictis, 619 1 . 



Aeluroidea, 616 2 , 618. 



Aeluronyx, 349 1 . 



Aeluropus, 623 1 . 



Aelurosaurus, 349 *, 

 400 2 . 



Aelurus, 623 1 . 



Aepyceros, 591 *. 



Aepyornis, 458 2 . 



Aepyprymnus, 535 2 . 



Aesculap-snake, 367 2 . 



Aesopia, 240 2 . 



Aetobatis, 154 2 . 



Aetosaurus, 382 *. 



Aex, 463 1 . 



Affinities, of Marsipo- 

 branchii, 115 ; of 

 Rhynchocephalia, 

 332. 



Afr. = African. 



Aftershaft, 421. 



Agalychnis, 311 l . 



Agama, 350 1 . 



Agamodon, 353 1 . 



Agamura, 349 *. 



Agapornis, 470 2 . 



Age, Carp, 219 1 ; ele- 

 phant, 571. 



Ageniosus, 221 2 . 



Aglossa, 309. 



Aglypha, 366 1 . 



