Me and low forms, 
Agassiz on, i, 380, 381 
Gill on, i, 38 3 
Traquair on, i, 381, 382 
Hilgendorf, i, 41, 416 
portrait of, i, 417 
Hilgendorfia, li, 455 
Hill, i, 415 
conclusions of, i, 277, 279 
Himantolophus, ii, 549 
hinalea, i, 158 
hingio, ii, 128 
Hiodon, i, 291, 394; ii, 45, 46 
figure of, li, 45 
Hiodontide, i, 290; ii, 45 
Hippocampus, i, 19; ii, 236 
figure of, i, 17, 250; ii, 238 
Hippoglossinz, li, 489 
Hippoglossoides, i, 205; ii, 
491 
Hippoglossus i, 205, 329; ii, 
489 
figure of, i, 332; ii, 492 
hirondelle, i i, 408; ii, 60 
His, i, 428 
Histiopteride, ii, 398 
Histiopterus, i, 260; ii, 333 
Histiothrissa ii, 52 
history of ichthyology, i, 387- 
428 
Hoffman, i, 412; ii, 546 
hog-choker, 
figure of, ii, 496 
hogfish, ii, 388 
figure of, ii, 387 
Holacanthus, ii li, 403 
figure of, ii, 404, 405 
skeleton ‘of, figured, i, 214 
Holbrook, i, 419 
Holcolepis, 
figure of, i, 454; ii, 43 
Holconoti, ii, 365, 379, 380 
suborder of, ii, 372, 
Holconotus, i, 404; ii, 375 
Holden, ii, 291 
Holder, ii, 409, 474 
on oarfish, ii, 474 
Holostei, i, 624; ii, 24 
Holotrachys, ii, 256 
Hollard, i, 412 
Hollardia, ii, 412 
Holocentride, 
family of, ii, 253 
Holocentrus, i, 267; ii, 253, 
255 
figure of, ii, 254 
Holocephali, i, 448, 508, 519, 
520, 561-567 
Holopterus, ii, 41 
Holoptychiide, i, 602, 603, 
624 
Holoptychius, 
basal fin of, figured, i, 603 
Index 
Holoptychius, 
dorsal fin of, figured, i, 49 
figure of, i, 451 
Holostomi, ii, 140, 141 
Holothurian, ii, 522 
Fierasfer issuing from, i, 
159 
Holurus, ii, 14 
Homalopteride, ii, 176 
Hombron, i, 408 
Home, i, 396 
Homistius, i, 586 
homocercal tail, i, 49, 81-83, 
602 
figure of, i, 84 
of flounder, i, 84 
homologies, 
of bones, i, 34, 35 
of pectoral limb, i, 85 
Homonotus, ii, 253 
homoplasy, i, 296 
Homosoma, ii, 283 
Hooker, 
on fishes prey of birds, i, 
166 
Hoplias, ii, 162 
: Hoplichthyida, ii, 441 
Hoplichthys, ii, 441 
Hoplopagrus, i, 271 
Hoplopteryx, 
figure of, i, 438; ii, 253 
Hoplostethus, i, 260, 263; ii, 
252 
Hoppin, 
on blind fish, ii, 202, 203 
Hornbaum-Hornshuch, ii, 144 
horn-dace, i, 122, 283; ii, 167 
figure of, i, 285; i, 168 
horned pout, ii, 35, 180 
figure of, ii, 187 
horned trunkfish, i, 374 
figure of, i, 373, 3763 i, 416 
horn-fish, ii, 412 
hornless trunkfish, i, 378; ii, 
418 
face view of, i, 379 
figure of, i, 378; ii, 416 
horse-eye-jack, ii, 276 
horsehead-fish, ii, 276 
figure of, i, 148 
horse-mackerel, ii, 135 
figure of, ii, 274 
horseshoe-crab, 
figure of, i, 572 
Houttuyn, i, 394, 416 
how fish cross watersheds, i, 
306 
how ‘hehe breathe, i, gt 
how to secure fish, i, 429 
Hoy, i, 419; ii, 64 
huchen, ii, 106 
Hucho, i, 253; ii, 62, 106 
figure of, ii, 107 
575 
Humboldt, i, 410 
on gas in swim-bladder, i, 
95 
humpback salmon, ii, 68, 72, 
80 
figure of, ii, 70, 72 
humpback sucker, ii, 174 
humpback whitefish, ii, 65 
Hutton, i, 416 
Huxley, i, 424, 428, 593, 6or; 
ii, 3 
on herring product, i, 330 
on Lepidostei, ii, 23 
Hybocladodus, i, 522 
Hybodus, i, 528, 529 
eggs of, figured, i, 527 
fin-spine of, figured, i, 528, 
529 
Hybopsis, ii, 167 
hybridism, i, 144; ii, 94 
Hydrocyon, ii, 162 
‘| Hydrolagus, i, 564 
Hyodon, i, 302 
Hyoganoidea, ii, 24 
Hyoganoids, li, 11 
hyomandibular, i, 508,521,606 
hyostylic skull, i, 508, 561; 
u,7 
figure of, i, 56 
Hypamia, ii, 36 
hypercoracoid, i, 89; ii, 1, 12 
Hyperoartia, i, 488, 490, 593 
Hyperoplus, ii, 521 
Hyperotreta, i, 488, 593 
Hyperprosopon, i ii, 375 
hypocoracoid, i, 89; ii, 12 
Hypocritichthys, 
figure of, i, 309; ii, 375 
Hypohomus, i ii, 312 
Hypopthalmide, i ii, 185 
Hypoplectrus, i, 235, 2715 
li, 237 
figure of, ii, 329 
Hyporhamphus, li, 212 
Hypostomides, ii, 227-240 
suborder of, ii, 239 
Hypotrema, i, 549 
hypural, ii, 142 
Hypseleotris, ii, 460 
Hypsoblennius, i, 242 
Hypsopsetta, ii, 493 
Hypsurus, ii, 375 
figure of, ii, 373 
Hypsycormus, ii, 34 
Hypsypops, | 4 
figure of, i, 227; ii, 382 
Hyrtl, i, 428 
Hysterocarpus, i, 304; ii, 374 
figure of, ii, 373, 379 
Icarus, ii, 43 
icefish, i, 146; ii, 123, 127 
figure of, i, 149; ii, 128 
