INDEX 



Every reference is to the page ; words in italics are names of genera or species ; figures 

 in italics indicate tliat the reference relates to systematic position ; figures in thick 

 type refer to an illustration ; f. = and in following page or pages ; n. = note. 



Abbott, 193 n. 



Abcona, 670 



Abdominal pores, 401 f. 



Abramis, 582 



Abyssascidut, 73 



Acanthaphritis, 706 



Acanthias, 4S5, 298 ; vertebral column, 



198 ; uterine nutrition, 434 ; A. 'oul- 



garis, 264, 455 ; pectoral tin, 243 

 Acanthicu^, 595 

 Acanthistius, 659 

 Acantlwcepola, 662 

 Acajithoclinus, 709 

 Acanthoct/biu'M, 678 

 Acanthodei, 44O f., 148 

 Acanthoderma, 72^ 

 Acanthodes, 442 ; A. wardi, 441 

 Acanthodidae, 44^ 

 Acanthodopsis, 44^ 

 Acanthonus, 712 

 Acanthophthalmus, 582 

 Acanthopleurus, 723 

 Acanthopoma, 589 

 Aeanthopterygii, 650 f., 159, 306, 543 ; 



diagram showing relationships of groups, 



651 

 Acanthuridae, 668, 2,i1, 651, 652, 654 

 Acanthurns, 608 ; A. chirurgiis, 357 

 Aeara, 672 



Accessory respiratory organs, 292 

 Acentronura, 63 4 

 Acentrophorus, 4^^ 

 Aceratias, 719 



Acerina, 659 ; A. cernua, 659 

 Acestra, 595 ; A. gladius, 595 

 Acestrorhamphus, 575 

 Acestrorhynchus, 675 

 AchUognathus, 5SS 

 Achiropsis, 6S7 

 Achirus, 687 

 Acipetiser, 492, 149, 262, 264, 273, 2/4, 



276, 282, 348 ; ribs, 201 ; lymph 

 follicles, 261 ; spiral valve, 268 ; gills, 

 283, 284 ; air-bladder, 298, 299 ; vas- 

 cular system, 319, 322, 328, 334 ; 

 spleen, 343 ; gonoducts of female, 400, 

 405 ; distribution, habits, and food, 493 ; 

 breeding, 494 ; economic value, 494 ; 

 .^1. huso, 494 ; A. rhynchaeus, pectoral 

 fin, 243 ; A. ruthenus, 493 ; scales, 187, 

 188 ; brain, 376 ; micropyles, 411 ; 

 larva, 494 ; A. sturio, 493, 494 ; verte- 

 bral column, 200 ; supra-renals, 346 ; 

 micropyles, 411 



Acipenseridae, 486, 489, 495 



Acipeuseroidei = Chondrostei, q.v. 



Acrania, 113 



Acrartete, 636 n. 



A crochordonichthys, 688 



Acrudns, 446 



Acrogaster, 656 



Acrognathus, 611 



A cropoma, 659 



Acropomatidae, 659, 654 



Acrotus, 644 



Actinistia, 47" n. 



Actinopterygii, -4~6' 



ActinolTooha, 28 f., 29 



Acysis, 588 



Adipose fins, 163 



^1 egaeonichthys, 719 



Aelurichthys, 688 



Aethalion, 64G 



Aetheolepis, 498 ; scales, 187 



Aetheospondyli, ^97 



Aetobatis, 465, 466 ; spines, 177 



Agassiz, 558 n., 685 n., 720 n. 



Ageniosus, 589 ; A. valencimnesi, 589 



Agnathostomata, I46 ; characters of, 147 



Agoniates, 575 



Agonidae, 700, 694 



Agonopsis, 700 



729 



