INDEX 



477 



opercular of, 271, 426 



skull of, 271 

 Ostariophysi 



antiquity of, 199 



branchiostegal rays of, 182 



diverticula of swim-bladder in, 184, 439 



otoliths of, 181 



protrusility in, 424, Fig. 76 



VVeberian apparatus in, 181 

 Osteoglossidse 



characteristic features of, 164 



parasphenoid of, 164 



relation to Albulidse, 166 



skull of, 161 

 Osleoglossum, Fig. 57 



affinity with Hyodon, 168 



dentition of, 164, 423 



otoliths of, 163, 174 



parasphenoid of, 164 

 Osleolfpis, Fig. 8 



skull of, 107 

 Ostraciontidse 



characters of, 286 



teeth of, 288 

 Ostracoderms 



as ancestors of cyclostomes, 76 



cephalic shield of, 196 



Kiaer's researches on, 79 



number of gills of, 424 



Stensio's researches on, 77, 78, 82 

 Oioliihuj, 137, 163 

 Otoliths, see systematic groups 

 Otophysi, ISS 



Garstang on, 173, 174 

 Oxylahrax, 296 



Pjedogenesis, 443 

 Palitogyrinus, Fig. 8 

 Palaeoniscoidei 



description of, 111, 112 



groups arising from, 116 



neurocranium of, 115 



opercular elements in, 426 

 Palironiscits, Fig. 12 

 Palate 



of Crossopterygii, 108 



of Elonichthys, 114 



of Lepidosteus, 130, 164 

 Palinurichlhys, 319 

 Panlodon, 164 

 Pantodontidae, 161 

 Parachtrnichlhys, Figs. 239, 241 



skull measurements of, 360 

 Parallelism, 248, 264 

 Parapercis 



comparison with Cirrhilus, 259 



comparison with Trichodon, 371 



otoliths of, 363 

 Parasphenoid 



of Arapaima, 164, 166 



functions of, 435 



of Osteoglosium, 164 

 Parathunnus, 319 

 Pareiopliteae, 321 



Parker, T. J. 



on skull of Rfgaltcus, 297 

 Parker, W. K. 



on embryology of jaws, 427, 428 

 Parr, \. e! 



on Aceratiidse, 407 



on evolution of Stomiatoidea, 160 



on illicium of Haplophryne, 408 



on inflation mechanism in puffers, 290 



on osteology of Iniomi, 207 



on Rhynchocfratias, 401, 403, 407 



on rostral bone of Haplophryne, 409 

 Parrot-fishes, see Scaridae 

 Pat^cus, Fig. 208 



skull of, 329 

 Patten, William 



on BothrioUpis, 100 

 Pectoral girdle 



of AstToscopus, 370 



of Cottopfrca, Fig. 237 



of Xotolhenia, Fig. 237 



of Pinguipes, Fig. 237 

 Pediculati 



adaptations in body-form, 389 



evolution of body-form, 386, 387 



opercular elements of, 426 



primarv adaptation of, 388 



skull of, 389 

 Pilor, Fig. 206 



neurocranium of, 438 



skull of, 329 

 Perca, Fig. 285 



otoliths of, 247, 253, 277, 317, 345 

 Percesoces 



Boulenger's classification of, 223 



derivation from true percoids, 261, 264 



specializations of, 262, 264 



otoliths of, 261 



Regan on "Mugiloidea," 266, 268 



skull of, 261, 262 

 Perciformes, 247, 274 

 Percis, Fig. 236 



agreement with Pinguipes, 358 

 Percomorphi, see also Percoidei 



adaptive radiation of jaws and teeth of. 

 Fig. 291 



classification of, 237 



definition of 237, 238 



divisions of, 246 



functions of otic region in, 246 



Percesoces related to, 261, 266 



Regan on, 246 



systematic characters of, 238, 239 



taxonomy of, 246 



Woodward on evolutionary stages of, 85 

 Perches, see Percoidei 

 Percoidei, see also Percomorphi 



correlation of skull and body form, 238 



neurocranium of, 242 



otic region of, 243 



otoliths of, 343, 345 



protrusile jaws of, 239 



relations of premaxillse and maxillae in, 

 242 



Regan on, 237, 238, 3S6, 371 



skull of, 238, 242, 256 



specializations in, 295 



s}Ticranium of. Fig. 298 



Woodward on, 85 

 Percophis, 363 

 Percopsis, 232 

 Periophthalmus, Figs. 228, 229 



eyes in, 439 



skull of, 346, 347 

 Perisledion, Figs. 220, 221 



lacr\'mal bones of, 343 

 PerUidus, Figs. 21, 283, 286 

 Petenia, 255 

 Pelrocephalus, Fig. 64 



mormyroid specializations in, 171 

 Pholidophorus, 136, Fig. 29 

 Photichlhys, 157 

 Photophores, 160, 161 

 Phractolctmus, 424 

 Phyllopteryx, 225, Fig. 106 

 Pikes, see Esocidje 

 Pinguipedidae, 356 

 Pinguipes, Figs. 236, 237 



skull of, 356, 374 

 Platax, Fig. 151 



relations of, 273, 274, 277, 281 

 Platycephalidae, 330 

 Platycephalus, Fig. 211 



otoliths of, 344 



skull of, 330 

 Platysomus, Figs. 15, 286 

 Plecostei, 312 

 Plecostomus, Fig. 80 



preopercular in, 197 



skull characters of, 196 

 Plectognathi, see also Balistoidei 



derivation of, 288 



relations of, 279 



specializations of, 295 

 Plethodus, 166 

 Pliotrema, 424 

 Poeciloidea 



branchiostegals in, 219 



Starks and Regan on, 214, 219 

 Pogonias, 252 

 Polar cartilages, 80 

 Polydactylus, 268, Fig. 144 

 Polyipnus, Fig. 52 

 Polymixia, 296 

 Polynemidae, 268 

 Polynemus, Fig. 144 



otolith of, 269 



skull of, 268 

 Poly»don,MA, Fig. 17 

 Polypterini, 108 

 Polypterus, Fig. 10 



classification of, 108 



protrusile jaw of, 242 

 Pomacanthus, Figs. 154, 290, 293 



skull of, 278 

 Pomacentrids, 255, 424 

 Pomadisidae, 248 

 Pomatomus, 300, Figs. 177, 294 

 Porcupine-fishes, see Diodontidx 

 Poronolus, Fig. 184 



