565 
eggs of fish, 
fertilization of, i, 125 
figures of, i, 127 
germ disk in, i, 135 
hatching of, i, 125 
of herring, i, 125 
month incubation of, i, 170, 
171 
transportation of, i, 171 
Eichwald, i, 411, 427 
Eigenmann, i » 415, 420; 
447, 148, 376 
on blind fishes, i, 117, 221, 
222; ii, 202, 523 
on Nematognathi, ii, 178 
photograph by, i, 222 
portrait of, i, 417 
Eigenmannia, ii, 187 
eighteen-spined sculpin, 
figure of, ii, 447 
Ekstrém, i, 410 
Elacate, ii, 282, 470, 471 
Elagatis, ii, 274 
Elanura, 
figure of, ii, 444 
Elasmobranchiates, i, 384 
Elasmobranchii, i, 462, 507, 
584; ii, 7 
Elasmobranchs, i, 92, 102, 
204, 506-522, 571, 583, 
588, 589 
characters of, i, 506-508 
classification of, i, 507-510 
ear sac in, i, 120 
geological distribution of, 
i, 459 
notochord in, i, 57 
subclass of, i, 507 
Elassoma, i, 290}; il, 296, 307, 
467 
figure of, ii, 295 
Elassomide, i 290; ii, 296 
family of, ii, 295 
elastic spring, i, 96 
Elater, 1, 582 
electric catfish, 
figure of, ii, 183 
electric cells, i, 553 
electric eel, i, 186; ii, 140 
Day on, i, 170 
electric organs, i, 25, 186, 187 
electrophores, ii, 187, 188 
Electrophoride, i ii, 187 
Electrophorus, i, 170, 186 
Eleotrids, ii, 460 
Eleotris, i, 254 
figure of, ii, 460 
Elera, i, 414 
Eleginus, i li, 537 
elephant sharks, i i, 540 
figure of, i, 565 
Elliott, 
on trout, ii, 105 
ii, 
Index 
Elonichthys, ii, 14 
Elopide, 1, 43; li, 35, 
Elopopsis, ii, 43 
Elops, i, 205, 393; ii, 43, 221 
figure of, i, 454; ii, 42 
Embiotoca, i, 404 
Embiotocide, i, 207, 290; ii, 
373 
Agassiz on, i, 377-379 
anal fin in, i, 125 
viviparity of, i, 376, 377 
Emblemaria, 
figure of, ii, 510 
embryo, i, 136, 138, 139 
embryology and growth, i, 
I3I-I51 
Embolichthys, ii, 522 
figure of, ii, 521 
emerald-fish, ii, 462 
Emery, i, 412; ii, 480, 481 
Emmelichthys, i, 262; ii, 346, 
41-44 
347 | 
Emmydrichthys, 
figure of, i, 180; ii, 436 
Empetrichthys, 
figure of, ii, 199 
Empo, ii, 137 
Enantioliparis, ii, 455 
Enchelurus, ii, 138 
Enchelycephali, ii, 140, 141, 
147, 152 
suborder of, ii, 142 
Enchelynassa, ii, 153 
Enchelyopus, 
figure of, ii, 539 
Enchodontide, ii, 136, 137 
Enchodus, ii, 136 
Endoskeleton, i, 439 
Enedrias, ii, 512 
Engraulidide, ii, 54 
Engraulis, i, 205; il, 54 
Enneacanthus, li, 301 
Enophrys, 
figure of, ii, 443 
Enoploside, ii, 317 
Enoplosus, i, 268; ii, 317 
Enteropneusta, i, 457, 461, 
462 
classification of, i, 464 
entoderm, i, 138 
Entosphenus, i, 490 
entozoa, i, 348 
Eocottus, ii, 449 
Eomyrus, ii, 150 
Eopsetta, i, 205; li, 491 
Eothynnus, i ii, 266 
Epelasmia, ii, 397, 398 
Eperlanus, ii, 123 
Ephippide, ii, 400 
Ephippus, i, 268; ii, 4oo 
epiblast, ii, 5 
Epigonichthys, i i, 483 
Epigonus, ii, 317 
Epinephelus, i, 19; ii, 323, 
330, 2 
figure of, i, 20; ii, 324-326, 
328 
Epiphysis, i, 112 
figure of, i, 111 
Eptatretide, i, 489 
Eptatretus, 1, 490 
figure of, i, 198 
equatorial fishes, 
specialization of, i, 248 
equatorial zone, i, 251 
Eques, ii, 357 
Equula, ii, 287 
Erebus, i, 408 
Ereunias, 
figure of, ii, 450 
Ereuniide, ii, 449 
Ericymba, 
figure of, ii, 165 
Erimyzon, i, 292; ii, 175 
figure of, i, 315; ii, 172 
Eriptychius, i, 435, 603, 578 
Erisichthe, ii, 34 
Erismatopteride, ii, 242, 296 
Erismatopterus, ii, 243 
figure of, ii, 242 
Ernogrammus, li, 513 
Erosa, ii, 436 
Erpetichthys, i, 204 
Erpetoichthys, i, 450 
figure of, i, 608 
Erpichthys, i, 608; ii, 510 
Erythrichthys, ii, 347 
Erythrinide, ii, 162 
Erythrinus, ii, 160 
escolars, ii, 267, 317 
Esmarck, i, 410 
Esmeralda, ii, 462 
esmeralda de mar, 
figure of, ii, 461 
Esocide, i, 290; 
192 
Esox, i, 109, 253, 315, 327, 
391; ii, 190, 194, 
figure of, i, 328; ii, 192 
Etelis, i, 262; ii, 338 
figure of, ii, 337 , 
Etheostoma, i, 129, 283; ii, 
310, 315 
figure of, i, 231; ii, 314 
Etheostomine, i, 230, 232; 
ii, 166, 306, 307, 310 
ethmoid, ii, 142 
Etmopterus, 
figure of, i, 189, 546 
etrumei-iwashi, ii, 52 
Etrumeus, ii, 52 
Eucalia, ii, 232 
Eucitharus, 
figure of, ii, 488 
Eucinostomus, i li, 347 
Eugnathide, ii, 26 
ii, 190, 
