Dipnoi, i, 77, 85, 89, 382 
Diptera, ii, 306 
Dipteride, i, 612 
Dipterus, i, 612 
gure of, i, 437, 449 
Discobatis, i, 553 
Discocephali, ii, 459-480 
Gill on, ii, 470 
suborder of, ii, 468 
diseases of fishes, i, 340-358 
contagious, i, 340 
parasitic, i, 342 
remedies for, i, 342 
Dismal Swamp fish 
figure of, i, 116; ii, 201 
dispersion of fishes, 
Agassiz on, i, 284 
barriers to, i, 297, 310, 311 
causes of, i, 318 
Cope on, i, 286 
by floods, i, 301 
of fresh-water fishes, 282- 
296 
of river fishes, 297-319 
dissection of the fish, i, 26-33 
Distomide, i, 477 
distribution of fishes, 
affected by coast line, i, 
247, 261 
agency of currents in, i, 242 
centers of, i, 243 
determined by tempera- 
ture, i, 241 
of fresh-water forms, i, 249 
general laws of, i, 238 
of marine forms, i, 245 
Panama, barrier to, i, 266 
of shore fishes, i, 263-265 
Suez, barrier to, i, 266 
zones of, i, 249, 251, 252 
Ditrema, ii, 375 
Dittodus, i, 521, 525 
doctor-fish, ii, 408 
Déderlein, i, 411, 416 
dogfishes, i, 519 
figure of, i, 545 
dogoro, ii, 381 
dog salmon, ii, 71-73, 80, 
Bi 
dog snapper, ii, 336 
Dolichoglossus, i, 463 
Doliolum, i, 479 
dollar-fish, ii, 283 
Dollo, i, 415, 427, 600, 601; 
li, 502 
portrait of, i, 413 
on tail forms, i, 84 
Dolloa, ii, 541 
Dolly Varden trout, i, 305; 
ji, 112, 113 
figure of, i, 327; ii, 114 
dolphins, i, 210; ii, 286, 362 
figure of, ii, 287 
Index 
Doncella, 
figure of, i, 297; ii, 180, 396 
Donovan, i, 410 
dorados, ii, 286 
figure of, ii, 287 
Doras, ii, 183 
Doratonotus, ii, 388 
Dormeur, 
figure of, ii, 460 
Dormitator, 
figure of, ii, 461 
dorsal fin, i, 10, 603 
figured, i, 49 
Dorosoma, i, 32, 300 
figure of, ii, 53 
Dorosomatide, li, 53 
Dorosomide, i, 290 
Doryichthys, ii, 236 
Dorypteride, ii, 14-16 
Dorypterus, ii, 15, 16 
Draciscus, 
figure of, ii, 452 
Draconetta, ii, 506 
Draconettide, ii, 506 
dragonets, i, 246; ii, 504 
drawing net at Milo, 
photograph of, i, 281 
Drepane, ii, 401 
Drepanaspide, i, 574 
Drepanaspis, i, 570 
figure of, i, 574 
Drepanide, ii, 4or 
Drepaniodus, i, 488 
drum, i, 290 
figure of, ii, 358 
duck-billed eels, ii, 150, 151 
Ductor, ii, 278 
ducts, i, 28 
ductus cholidechus, i, 32 
Dufosse, 
on air-bladder, i, 97 
Dugés, i, 90, 420 
Dugunonutatatonri, ii, 472 ° 
Dumeéril, i, 398, gor 
duodenum, i, 32 
Dussumieriida, ii, 52 
Dussumieria, ii, 52 
Duverncy, i, 390 
Duymeeria, i, 260; ii, 390 
dwarf, 
herring, ii, 54 
perch, ii, 306 
salmon, li, 117 
sunfish, ii, 467 
Dybowsky, i, 411 
Dynatobatis, i, 553 
Dysommide, ii, 150 
Dytiscus, ii, 144 
eagle ray, 
figure of, i, 558 
early writers on fishes, i, 272, 
422, 423 
567 
earliest sharks, i, 436, 443 
ear of fish, i, 119-121 
ear sac, i, 119, 120 
ear stones, i, 119 
earthquakes, 
fatal to fishes, i, 356; ii; 137 
Eastman, i, 427, 428 
on Cestraciont shark, i, 529 
on Clastes, ii, 32 
on Neoceratodus, i, 619 
portrait of, i, 425 
on teeth of Edestus, i, 530 
Ebisu, the god of fishes, ii, 344 
figure of, ii, 343 
Ebisus, ii, 323 
Echeneidide, ii, 468, 470 - 
Echeneis, i, 391; ii, 468, 470, 
471 
Echidna, i, 211; ii, 152, 153 
Echidnocephalus, ii, 138 
Echinorhinide, 
family of, i, 547 
Echinorhinus, i, 547 
Echiodon, i, 84 
economic fishes, i, 333 
ectoblast, i, 152 
ectocoracoid, i, 87 
ectoderm, i, 139 
ectopterygoid, i, 606 
Edaphodon, i, 565 
Edestus, 
teeth of, figured, i, 529 
eel-back flounder, 
figure of, ii, 494 
eel-faits, ii, 142 
eel-like fishes, ii, 137-158 
eel-mother, ii, 144 
eel-pouts, 
figure of, ii, 518, 519 
eels, i, 21, 210, 217, 268, 290; 
u, 40, 44, 147, 153, 157 
Cope on, ii, 139 
Giinther on, ii, 141 
larva of, figured, ii, 148 
migration of, ii, 142 
reproduction of, ii, 143 
species of, ii, 148 
shoulder-girdle in, ii, 142 
Woodward on, ii, 140 
effects on distribution, 
of shore line, i, 262 
of temperature, i, 149 
Egerton, i, 423 
Egertonia, ii, 396 
eggs of fish, 
artificial impregnation of, 
i, 150 
of bottle-nosed chimera, i, 
127 
care of, i, 128 
carrying of, i, 128, 171 
of Embiotocide, i, 127 
embryo of, i, 128 
