472 



INDEX 



CyclopteridE, 339 

 Cycloptenis, Fig. 217 

 Cyclostomes, Figs. 2, 3 



branchial basket of, 77 



origin from ostracoderms, 76 



sliull of, 99 

 Cyclothone, Fig. 54 



eyes in, 439 



jaws in, 159 



mouth in, 416 



not ancestral to Lyomeri, 213 



suspensorium in, 158 

 Cynoscion 



otoliths of, 253 

 Cyprinoidea 



ancestral type of, 216 



branchiostegal rays in, 182 



interparietal fontanelle of, 193 



mouth of, 416 



neurocranium of, 439 



otoliths of. ISl, 182, 193, 194 



pharyngeal teeth of, 193 



primitive type of, 193 



resemblance to Anabas, 271 



resemblance to synentognaths, 223 



Starks on, 214 

 Cyprinus, Fig. 74 



Dactylagnus , Fig. 244 



skull of, 363 

 Dactylopterus, Figs. 222, 223 



cranial buckler in, 441 



pectoral girdle of, 343 



preopercular in, 427 



skull of, 343 

 Dactvloscopidae, 363 

 Dalli'a, Fig. 95 



skull of, 216 

 Dcpedius, Figs. 22, 283 

 Dareste, M. C. 



on relations of gobies, 349 

 Day, Francis 



on Rhynchobdella, 353 

 Dean, Bashford 



on chimaeroids, 103 



on exoskeleton of sharks, 100 



on "unnatural history resemblances,' 

 196 

 Deep-sea fishes, 150 

 Delsman, H. C. 



on Epibulus, 257 



on protrusility, 424 

 Dentition, see Teeth 

 Dercetidte, 201 

 Diceratias, 407 

 DicroUne, Fig. 256 

 DifTerential growth rates 



D'Arcy Thompson on, 445 



Julian Hu.\ley on, 445 



regulation of, 444, 445 

 Dinolfsles, Fig. 140 



compared with Sphyrana, 264 



compared with Luciolales, 247 



as true percoid, 247 

 Diodon, Figs. 170, 171 

 Diodontidae 



beak of, 288 



dentition of, 424 



inflation mechanism in, 290 



resemblance to Molidje, 294 



skull of, 292 

 Diplodocus, 374 

 Diplomystes, 195 

 Dipnoi 



not ancestors of amphibians, 105 



dentition of, 104. 105 



skull patterns of, 104, 105 

 Diplerus, Fig. 8 

 Discocephali, 319 

 Distichodus. Fig. 71 



adnasal in, 183 



musculature of jaws, 184 

 Divergent evolution 



in ceratioids. Fig. 277 

 Diverticula of swim-bladder 



in clupeoids, 147, 439 



homology of, 155 



in mormyroids, 169, 173, 439 



in Ostariophysi, 173, 184, 439 

 Dollo, Louis 



on Sphymna, 261 

 Dollo's law 



apparent exception to, 367 



application of, 290 



examples of, 123, 172 

 Dolopichthys, Fig. 277 



dorsal fin of, 405 



illicial trough of, 404 

 Dragonets, see Trachinoidei 

 Drepane, 440 

 Drepanidse, 274 



Echeneis, Figs. 198, 199 



otolith of, 321 

 Echidnacephalus, 300 

 Eels, see Apodes 

 Eigenmannia, Figs. 72, 73 



skull of, 186, 187 

 Elapopsis, 138 

 Elasmobranchs 



auditory capsules of, 440 



cartilaginous skull of, 100 



compared with teleosts, 101 



number of gills, 424 



Sewertzoff on embryology of, 80, 83 

 Electric eels, see Gymnotids 

 Electric organs, 368 

 Electrophorus, Figs. 72, 73 



compared with Symbranchus, 352 



as degraded characin, 186 



skull of, 187 

 Eleotris, Figs. 226, 229 



compared with Caularchus, ^ill 

 Elrginops, Fig. 238 



characters of, 358 

 Elonichlhys, 114 



Elopidas 



dentition of, 423 



otolith of, 212 



skull of, 139 



two sections of, 137, 138 

 Elops 



compared with Plwtichthys, 157 



palatine process of, 142 



skull of, 138, 139 



supratemporal of, 165 

 Embiotocids, 424 

 Embryology 



Bigelow and Welsh on, 428 



of brain, 428, 430 



of eye, 423, 428, 430 



of jaws, hyoid arch and opercular series, 

 80, 427, 428, 430 



of mouth, 423, 428, 431 



of palatoquadrate arch, 428 



of teleost skull, 112,439 

 Emery, Carlo 



on relations of gobies, 349 

 Enchelurus, Fig. 81 

 Enchodontidffi 



mouth of, 416 



Regan on, 205 

 Enchodus, 204 

 Endocranial vault, 435, 436 

 Endocrine glands, 445 

 Engraulis, Fig. 40 



hyomandibular in, 203 



ceeth in, 138 

 Enoplirys, Fig. 216 



skullof, 339 

 Enzymes, 453 

 Ephippidse, 273 

 Ephippus 



otolith of, 277 

 Epibranchial organ, 179 

 Epibulus, Fig. 131 

 Epinnula, 319 

 Erythrinus, Figs. 67, 68 



convergent resemblance to Amia, 183 



as unspecialized type, 182 

 Escolares, 315 

 Esocidas, 214 



mouth of, 416 

 Esox, Figs. 95, 285 



not related to Dinokstes, 247 



otolith of, 214 



skullof, 214 

 Ethmoid region 



adiustments in, 440 



Starks on, 440 

 Eugnathids, 131 

 Eugnathus, Fig. 27 



hyomandibular of, 132 



skullof, 131 



Woodward's figure of, 132 

 Ethmo-vomerine block, 435 

 Eumetichthys, 296 

 Eurypholis, Fig. 83 



skull of, 204 

 Euslhenopteron, Fig. 9 



hyomandibular of, 108 



