132 
Agonus, 700; A. cataphractus, 700 
Agrammus, 696 
Agriopus, 695 
Aida, 639 
Ailia, 588 ; air-bladder, 302 
Ailiichthys, 58S 
Aipichthys, 666 
Air-bladder, as an accessory respiratory 
organ, 291 f.; Amia, 291 ; Lepidostens, 
291, 299; Sudis gigas, 291; Eryth- 
rinus taeniatus and E. braziliensis, 291 ; 
Neoceratodus, 291, 300; Protopterus, 
291, 301, 302 ; Lepidosiren, 291 ; struc- 
ture, 297; in different Fishes, 298 ; 
“red bodies,” 307 ; “red glands,” 307, 
308, 309 ; gases of the air-bladder, 309 ; 
functions, 309 ; in locomotion, 310; as 
a vocal organ, 358 ; connexion with the 
auditory organ, 388, 389, 390 
Albula, 548, 541, 549; vestigial conus 
arteriosus, 329, 548; A. conorhynchus, 
548 ; larva, 548 
Albulidae, 547, 544 
Alburnus, 582; A. lucidus, 167, 583 
Aleock, 695 
Alder and Hancock, 38 
Alepidosauridae, 614, 606 
Alepidosaurus, 614: A. ferox, 614 
Alepocephalidae, 369, 544 
Alepocephalus, 570 ; A. rostratus, 570 n. 
Aleposomus, 970 
Alestes, 575 
Alimentary canal, of Hemichordata, 11, 
25; of Tunicata, 54, 67 ; of Amphioxus, 
120; of Fishes, 252 f.; regions, 252 ; 
mesenteries, 258; histology, 259 f. ; 
glands, 270 
Allabenchelys, 58S 
Allis Shad, 564 
Allman, 22'n., 705 n. 
Alopecias vulpes, 451, 452 ; spiral valve, 265 
Aluteres, 724 | 
Amaroucium, 88 3A, proliferum, stomach, 
88 
Ambassinae, 660 
Ambassis, 660 
Aimbloplites, G57 
Amblyapistus, 695 
Amblyopsidae, 678, 361, 395, 606 
Amblyopsis, G18; A. spelaea, 166, 361, 
618, 619 
Amblyopus, 689 
Amblypharyngodon, 582 
Ainblypterus, 487 
Amia, 499, 149, 160, 262, 273, 274, 276, 
283, 291, 393, 609‘n. ; fossil, 501; A. 
calva, 499, 500; scales, 189 ; vertebral 
column, 201, 202, 203; skull, 228; 
median fins, 235; pectoral fin, 243, | 
244; spiral valve, 268 ; pseudobranch, 
284; air-bladder, 297, 299, 310; heart, 
328; arteries to air-bladder, 337 ; sen- 
INDEX 
sory’ canal, 385; nephrostomes, 401, 
402; segmentation of ova, 409 ; distri- 
bution and habits, 499 ; spawning, 500 ; 
nest, 500, 501 ; larvae, 501 : 
Amiidae, 499, 299, 497 
Amiopsis, 501 
Amiurus, 588, 261; liver and pancreas, 
273; A. catus, rectal valve, 254 ; renal 
portal system, 319; A. nebulosus, 587 
n., 592; A. nigrilabris, blind, 394 
Ammocoetes, 428, 46, 262, 272, 280, 
280 n., 327, 343, 428 ; metamorphosis, 
429 ; protective value of the skin, 429 
Ammocrypta, 659 
Ammodytes, 639, 275; <A. lanceolatus, 
639 ; A. tobianus, 639 
Ammodytidae, 639, 637 
Ammopleurops, 687 
Aimmotretis, 6S7 
Amniota, 745 
Ampheristus, 695 
Amphioxus, 7/2 f., 4, 37, 46, 110; general 
characters, 113; -external characters, 
114 ; anatomy, 116, 117 ; musculature, 
117; skeleton, 119; notochord, 119; 
alimentary canal, 120; branchial bars, 
122; endostyle, 123; coelom, 123; 
vascular system, 124, 125 ; renal organs, 
125, 127; nervous system, 127 ; sense- 
organs, 128 ; gonads, 129; embryology 
and life-history, 130, 130, 131, 132, 
133, 134, 135, 136; compared with 
Hemichordata, 11 f., 16, 29 f.—see also 
Branchiostoma 
Amphipnoidae, 598 
Amphipnous, 598 ; respiratory air-sacs of, 
598 ; A. cuchia, 294, 598 
Amphiprion, 672 
Amphisile, 633 ; A. strigata, 633 
Amphisilidae, 633, 628 
Amphistiidae, 684, 683 
Amphistium, 684; A. paradoxuin, 684 
Amphistylic, 222, 223 
Anabantidae, 645, 292, 637; distribution 
of, 645 
Anabas, 645, 3553; <A. scandens, 645 ; 
labyrinthiform organ, 293 
Anableps, 616, 419; intromittent organ, 
414; development of embryos in ovi- 
sacs, 418; A. tetrophthalmus, 617 
Anacanthini, 646 f., 548, 702, 708 
Anacyrtus, 976 . 
Anadromous, 413 
Anallantoidea, 745 
Anamniota, 745 
Anampses, 673 
Anapterus, G11 
Anarrhichas, 709 ; teeth, 251; A. lupus, 
710; eggs, 408 
Anaspida, 537 f., 149 
Anchinia, 96,100; A. rubra, 100; poly- 
morphism, 100 
