INDEX 



Acanthocybium, 317, 319 

 Acanthopterygii, 231 



branchiostegals of, 231 



opercular elements of, 426 



parallelism with Microcyprini, 219 



protrusility in, 424, Fig. 116 



Smith Woodward on, 301 



vertebral column of, 301 

 Acanthurids. 279 et seq. 



eyes in, 439 

 Acanthurus, 281 

 AcentTophorus, Figs. 21, 287 

 Aceralias 



description of, 407 



stage in evolution of Aceratiidse, 410 

 Aceraciidas 



Parr on, 407 



specializations of, 407 



three stages in evolution of, 410 

 Acipenser, Figs. 19, 20. See also Chon- 



drostei. 

 Actinopter>-gii 



contrast with shark, 116 



opercular elements of, 425 



primitive, 116 

 Adaptation 



paradoxes of, 446, 447 

 Adaptive radiation 



of jaws and teeth in percomorphs, Fig. 

 291 



of mouth, 415 



of premaxilla and maxilla. Fig. 283 

 Adioryx, 237 

 Adipose fin 



Garstang on, 193 

 Adnasal 



in Distichodus. 183 

 AgonidsE 



relations with Platycephaiidse, 330 

 Aipkhthys, 207 



as ancestor of carangoids, 300 



vertebrae of, 301 

 Air-bladder 



Garstang on, 173 



of Heteromi, 200 



of Holocentrus, 237 



homology of diverticula of, 155 



of Hyodon, 168 



independent origins of, 174 



of nematognaths, 196 



of NotopttTus, 169 



of Ostariophysi, 181 



relation to Weberian ossicles, 181 



of tv^pical nematognaih, Fig. 78 

 Alabe's, Fig. 232 



characters of, 352 



Albula, 203, Fig. 37 

 Albulids 



as allies of mormyroids, 173 



dentition of, 423 



relationships of, 144, 166 

 Atdrovandia, Fig. 295 

 Alepidosaurus, 201 

 AUpisatirus 



teeth of, 204 

 Alepoctphalus, Fig. 51 



epibranchial organ in, 179 



supramaxillaries in, 157 

 Aleuura, Figs. 163, 165 



erectile spine of, 285 



skull of, 284 



specializations in, 295 



suspensorium in. Fig. 290 

 .\llis, Edward Phelps 



on Amia, 108, 134, 425 



on branchial arches, 81 



on branchial muscles, 425 



on Dactylopttrus, 343 



on Esox, 216 



on hyomandibular of teleostomes, 81 



on intermaxillarj- tissue, 267 



on interopercular, 425 



on morphology of teleost skulls, 412 



on Polypurus, 108, 110, 111 



on premaxillte, 96 



on primitive shark, 82, 101 



on Scomber, 309 



on Scorpsenoidei, 322 



on SebasUs, 325 

 .^llotriognathi, 295-300 

 .\mbassid£e, 264 

 Amblyopsis, 219 

 Amblyopsoidea, 214, 219 

 Ambystoma 



experiments on eye of, 454 



nasal capsules of, 454 

 Amia, 133, 134, Figs. 23, 28, 283 



AUis on, 108, 134, 425 



branchial muscles of, 425 



comparison with PolypUrus, 108 



maxilla of, 242 



premaxillse and maxillae of. Fig. 283 



resemblance to characins, 183 

 .■\mioidei, 131 



Weberian apparatus lacking in, 183 

 Amiurus 



chondrocranium of. 196 

 Ammodylfs, 201, Fig. 234 



otoliths of, 355 

 .'\mmod\'toidei, 354 

 Amphioxus 



as degraded cyclostome, 99 

 Amphipnous, 350 

 AmphisUe, 226, Fig. 109 



469 



Anabantoidea, 269 

 Anabas, Figs. 145, 146 

 AnahUps, Fig. 98 



otolith of, 321 



skull of, 220 

 Anacanthini, 359 



Regan on, 380 

 Anacanthus, Figs. 164, 165 



specializations in, 286, 295 

 Anarhichas, Figs. 254, 255 



skull of, 376 



teeth of, 423 

 .Angel-fish, see Chaetodontoidea 

 Angelickthys, Fig. 153 



skull of, 278 

 Anglers, see Pediculati 

 Anguitla, Fig. 82 

 Anlagfn, 445, 449 

 Antennariidae, 389 



differences among, 394 



pectoral pterygials of, 387 

 AnUnnarius, Figs. 265, 266, 288 



Cuvier on, 387 



iUicium of, 389, 394, 403 



mouth region in. Fig. 288 



neurocranium of, 392 



opercular of, 401 



skull of, 389, 390, 391 

 Antigonia, Fig. 149 



skull of, 273 

 Aploactis, Fig. 208 



compared with Patacus, 330 

 Aplodinolus 



otolith of, 253 

 .Apodes, 202 



derivation of, 203 



otoliths of, 203 

 Apogon 



otoliths of, 233 

 Apogonidae, 247 

 Arapaima, Fig. 59 



articulation of parasphenoid, 164 



differential growth rates of, 434 



scale bone of, 165 



teeth on parasphenoid, 166 

 Archosargus, Figs. 123, 291 



adjustments for balance, 441 



jaws and teeth of, 453, Fig. 291 



skull of, 249 

 .Arcturus expedition 



studies on body-form, 432 



studies of larval fishes, 428 

 Argentina 



otolith of, 163 

 Argyropelecus, Fig. 52 



mouth of, 416 

 Arius, Fig. 79 



