578 
Lake Nicaragua, 
shark from, i, 542 
Lake Patzcuaro, 
viviparous fishes from, i, 
126 
Lake Pontchartrain, 
fish fauna of, i, 314 
lake trout, ii, 66, 115 
figure of, ii, 114 
lake whiting, ii, 65 
Lamdodus, i, 522 
Laminaria, ii, 544 
Lamnide, 1, 532, 537, 538, 542 
Lamna, i, 534, 538 
teeth of, figured, i, 537 
figure of, 447 
lamnoid sharks, i, 519, 533 
distinguished, 1, 534 
families of, i, 534 
Lampetra, i, 491 
figure of, i, 120, 492 
lamprey, i, 28, 35, 56, 111, 
204, 249, 290, 490, 506 
ascending brook figured, i, 
496 
brain of, i, 112 
catfishes destroyed by, i,358 
extinct forms, i, 487 
fate of, i, 504 
food of, i, 491 
gill-basket of, figured, i, 92. 
8 
405 
Kamchatka, i, 495 
method of attack, i, 493 
migration of, i, 494 
orders of, i, 488 
parasites of, i, 354 
Reighard on, i, 491 
spawning of, i, 498, 500 
structure of, i, 486 
Surface on, i, 491 
Lampridide, ii, 16 
family of, ii, 243 
Lampris, i, 210, 322; ii, 228, 
245, 288 
figure of, i, 323 
shoulder-girdle, figured, ii, 
243 
Lanarkia, i, 570, 622 
figure of, i, 574 
lancelet, i, 28, 31, 121, 204, 
484-485, 506; ii, 467 
characteristics of, i, 482 
figure of, i, 484 
habits of, i, 483. 
vertebral column of, i, 55 
lancet-fish, ii, 408 
figure of, ii, 135 
lancet of surgeon-fish, i, 181 
lane-snapper, 
figure of, ii, 336 
Lankester, i, 61, 87, 426, 571, 
$93 
Index 
lantern-fishes, ii, 41, 61, 128, 
129, 525 
figure of, li, 133 
lantern-flounder, ii, 488 
laolach, i, 620 
Laparus, ii, 518 
large-mouthed black bass, 
figure of, ii, 305 
Larimus, ii, 355 
Larvacea, i, 470, 473 
figure of, i, 480 
larval development of fishes, 
i, 139-141, 143-147, 174- 
176 
Dean on, i, 139 
in common eel, i, 141 
Gilbert on, i, 142 
figures showing, 1, 140-142 
in brook lamprey, i, 140 
in sturgeon, i, 141 
larval flounder, 
figure of, ii, 483 
larval forms, 
of Chetodon, i, 144 
figures of, i, 140-142 
of flounder, figured, i, 147, 
175, 176 
of lady-fish, i, 147 
of Lepidosiren, i, 620, 621 
of Mola, i, 143, 145 
of sailfish, i, 140 
of swordfish, i, 139 
Lasianits, 
figure of, i, 580 
Lateolabrax, i, 324; ii, 320 
lateral fold, i, 64 
Balfour on, i, 71-73 
Kerr on, i, 72 
Mollier on, i, 71 
lateral line, i, 9, 22, 23 
a mucous channel, i, 22 
Dean on, i, 23 
function of, i, 23 
relation to touch, i, 122 
in singing-fish, figured, i, 23 
Lates, ii, 320, 330 
Latham, i, 396 
Latilide, the, ii, 361, 363 
Latilus, ii, 362 
Latridide, ii, 363, 364, 426 
Latris, ii, 363 
lavaret, ii, 65 
lawyer, ii, 335, 538 
Lay, 1, 409 
Leach, i, 396 
leather-carp, i, 151 
leather-jackets, ii, 272, 413 
Lebias, ii, 198, 201 
lectocephalous condition, 
Giinther on, i, 142 
Leidy, 1, 426 
Leiognathide, ii, 287, 348 
Leiognathus, ii, 287 
Leiostomus, ii, 356 
Leiuranus, ii, 150 
length of intestine, i, 33 
Lentipes, ii, 466 
leopard toadfish, 
figure of, ii, 525 
Lepadogaster, 1, 263; ii, 531 
Lepechin, i, 396 
Lepidaplois, li, 390 
figure of, ii, 389 
Lepidocottus, ii, 420, 449 
Lepidopide, 
family of, ii, 267 
Lepidopsetta, ii, 493 
Lepidopus, i, 210; il, 267 
Lepidorhombus, i, 206, 
488 
Lepidosiren, i, 60, 73, 85, 89, 
100, 149, 450, 619, 621, 
6: 
ii, 
22 
adult male, figured, i, 620 
larval forms, figured, i, 620 
at 3 days, i, 620 
at 30 days, i, 621 
at 4o days, i, 621 
at three months, i, 621 
pectoral fin in, i, 60 
Lepidosirenide, i, 88, 612, 619 
Lepidostei, ii, 13, 26 
Huxley on, ii, 23 
Zittel on, ii, 23, 24 
Lepidosteids, ii, 32 
Lepidosteoidei, i, 382 
Lepidotide, ii, 24 
Lepidotes, ii, 24 
Lepidotrigla, i, 259; ii, 456 
Lepisoma, i, 208; ii, 508 
Lepisosteidz, i, 290; ii, 11, 
29, 30 ‘ 
Lepisosteus, i, 32, 66, 85, 101, 
102, 291, 314, 357, 604, 
623; i, §, 6, 23, 29, 30, 
32 
Agassiz on, ii, 5 
Balfour and Parker on, ii, 5 
Eastman on, ii, 32 
figure of, i, 452; ii, 31 
Giinther on, li, 5, 7 
Miiller on, ii, 517 
tail of, figured, i, 82 
Lepomis, i, 302; ii, 301 
figure of, i, 4; ii, 300 
Leptecheneis, 
figure of, i, 197; ii, 468 
leptocardial tail, i, 81, 83 
Leptocardians, i, 383 
Leptocardii, i, 55, 482-485 
Leptocephalide, ii, 149 
Leptocephalus, i, 211; ii, 148, 
149 
figure of, ii, 150 
leptocercal tail, i, 50, 81, 83, 
507, 602 
