758 
INDEX 
Thaumatostomias, 571 
Thaumaturus, 565 
Thelodus, 524; T. pagei, 524; T. tulensis, 
525 
Therapon, O60, 361 
Thilo, 682 n. 
Thoracopterus, 545 
Thoracostei, 627, 629 
Thread-cells, in Myxinoids, 182 
Threpterius, 664 
Thresher Shark, 451, 452 
Thrissopater, 562 
Thrissopatrinae, 562 
Thrissops, 546 
Thryptodus, 549 
Thunnus, 678, 275: T. thynnus, 678 
Thursius, 477 
Thylacium, 89 
Thymallus, 565; T. vexillifer=vulgaris, 
568 
Thymus, 344, 345 
Thyrina, 639 
Thyroid gland, 46, 343, 344 
Thyrsites, 679 
Thyrsitocephalus, 679 
Thyrsoidea, 605; T. 
meleagris, skull, 604 
Tilapia, 671; T. dardenniti, 671 ; T. dolloi, 
152 
Tile-Fish, 661 
Tinca, 582; T. vulgaris, 588, 171, 260, 
320; renal portal system, 320, 321 
Titanichthys, 537 
Todaro, 39 
Tongue, 252 
Tongue-bars, 12, 12, 13, 120, 135 
Tope, 449 
Tornaria, 18, 18 f., 28, 31; 7. agassizii, 
21; T. grenacheri, 19; T. krohni, 19 
Torpedinidae, 462 
Torpedo, 468 ; electric organs, 365, 366: 
T. hebetans, 463; T. marmorata, 463 ; 
T. narce. 463; T. ocellata, 463 
Toxotes, 658 ; T. jaculator, 658 
Toxotidae, 658, 653 
Trachelochismus, 709 
Trachelyopterus, 589, 361 
Trachichthys, 656, 655 
Trachinidae, 704, 703 
Trachinops, 659 
Trachinus, 7O4; warning colours, 174 ; 
poison-glands and spines, 176 ; 7. draco, 
705, 176; pectoral arch of, 703; T. 
vipera, 705, 176 
Trachyglanis, 588 
Trachynotus, 677 
Trachypoma, 659 
Trachypteridae, 775, 152 
Trachypterus, 715; T. arcticus, 715; T. 
iris, 715; T. taenia, 160 
Trachyrhynchus, 647 
Traquair, 436, 523, 530, 537, 687 n. 
T. 
macrura, 605 ; 
Traustedt, 38, 101 n. 
Tremataspidae, 430 
Tremataspis, 530 
Trematomus, 706 
Tremblador, 580 
Triacanthidae, 722, 
Triacanthodes, 722 
Triacanthus, 722; scales, 190; sound- 
production, 357; 7. biaculeatus, 361; T. 
brevirostris, 361 ; pectoral arch of, 722 
Trichiurichthys, 679 
Trichiuridae, 679, 676 
Trichiurus, 679 
Trichodon, 663 
Trichodontidae, 663, 654, 704 
Trichogaster, 669, 293 
Trichomycterinae, 589 
Trichomycterus, 589 
Trichonotidae, 706 
Trichonotus, 706 
Trigger-Fishes, 724, 174, 357 
Trigia (Gurnards), 701, 693 ; liver, 272 ; 
air- bladder, 305; sound-production, 
361; 8632) 2) cuculus, Vi OlnS Osten. 
gurnardus, 701, 363 ; rectal valve, 254 ; 
T. hirundo, 701, 363; T. lineata, 701 ; 
T. lyva, 701, 363; T. obscura, 701 
Triglidae, 700, 694; coloration, 
sounds, 361, 363 
Triglops, G98 
Triglopsis, 697 
Trigonodon, 665 
Triodon, 723, 721; T. bursarius, 728 
Triodontidae, 723, 721 
Triplophos, 571 
Tripterophycis, G48 
Trissolepis, 487 
Tristichopterus, 478 ; T. alatus, 479 
Tristychius, 445 
Troglichthys rosae, 619 
Tropheus, 671 
Trophozooid, 98, 100 
Tropidichthys, 726 
Troschel, 682 n. 
Trout, 566 f., 567; Brook-, 567 ; Brown, 
567 ; Gillaroo, 260 ; Sea-, 567 
Trumpet-Fish, 154 
Trunk-Fishes, 724 
Trygon, 464; spines, 177 ; uterine nutri- 
tion, 434 ; 7. pastinaca, 464 ; 7. sabina, 
464 
Trygonidae, 464, 465 
Trygonorhina, 460, 461 
Trypuuchen, 6S9 
Trypauchenichthys, 689 
Tunie, 63 
Tunicata, 63, 35, 36 £, 39, 4; S0en: 
affinities, 62 ; external form, 64 
Tunicine, 37 
Tunny, 678, 678 
Turbot, 687 
Turner, 593 n. 
721 
164 ; 
