838 



Terquemia, 451 

 Tessarolax, 551 

 Tethyopsis, 51 

 Tetinka, 444 

 Tetracamera, 398 

 Tetrachela, 762 

 Tetracidaris, 274 

 Tetnicrinus, 540 

 Tetractinella, 418 

 Tetracystis, 154 

 Tetradella, 738 

 Tetragonites, 652 

 Tetragonoceras, 606 

 Tetragraptus, 129 

 Tetrameres, 612 

 Tetrameroceras, 612 

 Tetramorion, 612 

 Tetranota, 522 

 Tetrapygus, 281 

 Tetraster, 248 

 Tetrataxis, 29 

 Teiithopsis, 688 

 Textularia, 27 

 Thais, 558 

 Thalamopora, 33, 71 

 Thalas.sina, 764 

 ThwLdbSsites, 452 

 Tlialassoceras, 637 

 Thalassocrinus, 238 

 Thaleops, 720 

 Th'ülocrinus, 199 

 Thamnasteria, 103 

 Thamnastrea, 103 

 Thamniscus, 341 

 Thamnodictya, 61 

 Thamnophyllum, 84 

 Tliamnotrypa, 346 

 Thaumastocoelia, 71 

 Theca, 571 

 Thecidea, 365, 388 

 Thecidella, 388 

 Thecidiopsis, 388 

 Thecidium, 388 

 Thecocyathus, 95 

 Thecocyrtella, 413 

 Thecocystis, 159 

 Thecosiphonia, 55 

 Thecosrailia, 99 

 Thecospira, 419 

 Thecostegites, 117 

 Theiphusa, 767 

 Thenarocrinus, 215 

 Theoiioa, 322 

 Thetsitea, 552 

 Thiara, 547 

 Thiemella, 382 

 Thiolliericrinus, 234 

 Thlipsura, 739 

 Tholiasterella, 62, 63 

 Tholopora, 326 

 Thomasina, 374 

 Thomisus, 790 

 Thoracoceras, 600 

 Thracia, 467 

 Thrinoceras 604 

 Thrips, 800 

 Thurammina, 25 

 Thurmannia, 669 

 Thyasira, 487 

 Thylacocrinus, 189 

 TliylaccKles, 547 

 Thysanocenis, 652 

 Thymnocrinus, 187 

 Tliysanodictya, 61 

 Thysanopeltis, 720 

 Tkysanotus, 371 

 Tiaiticrinus, 158 

 Tiarechinus, 298 

 Tibetites, 635 

 Tibtelta, 571 

 Ticfiogonia, 463 

 Tilesia, 322 

 Timanites, 631 

 Tindaria, 441 

 Tinoporus, 33 

 Tirolites, 648 



TEXT -BOOK OF PALEONTOLOGY 



Tissotia, 671 

 Titanocarcinus, 767 

 Tityus, 788 

 Tivela, 493 

 Tmaegoceras, 655 ' 

 Tolypammina, 25 

 Tomocheilus, 539 

 Tonicella, 513 

 Tonicia, 513 

 Tonna, 555 

 Torellella, 572 

 Torinia, 538 

 Tormocrinus, 241 

 Tornatella, 565 

 Tornatellea, 565 

 Tornatina, 568 

 Tornoceras, 630 

 Torynifer, 398 

 Torynocriniis, 240 

 Toucasia, 477 

 Tournoueria, 545 

 Toxaster, 294 

 Toxometra, 237 

 Toxopneustes, 282 

 Trachyceras, 648 

 Traehydermon, 513 

 Trachydomia, 539 

 Trcwhynerita, 539 

 Tiachyodon, 513 

 Trachypora, 114 

 Trachysagenites, 639 

 Trachyteuthis, 687 

 Tragophylloceras, 652 

 Trapezium, 472 

 Trauvmtocrinus, 225 

 Tremabolites, 68 

 Tremadictyon, 63 

 Trematella, 335 

 Trematis, 377 

 Trematobolus, 376 

 Trematoceras, 604 

 Trematocystis, 155 

 Treinatodiscus, 604 

 Trematonotus, 521 

 Trematopora, 339 

 Trematopygus, 290 

 Trematospira, 414 

 Tremopora, 349 

 Treposella, 738 

 Trepospira, 525 

 Tresus, 498 

 Tretaspis, 711 

 Tretoceras, 609 

 Tretospira, 539 

 Triacrinus, 208 

 Triadosialis, 811 

 Triainoceras, 633 

 Triarthrus, 715 

 Tribachiocrinus, 224 

 Tribliocrinus, 191 

 Triboloceras, 604 

 Trichasteropsis, 249 

 Trichites, 446 

 Trichiulus, 793 

 Trichopteridium, 814 

 Tricoelocrinus, 170 

 Tridacna, 490 

 Triforis, 550 

 Trigeria, 401, 414 

 Trigondictya, 346 

 Trigonella, 406 

 Trigonellina, 405 

 Trigonia, 467 

 Trigonoceras. 604 

 Trigonocoelia, 442 

 Trigonocrinus, 241 

 Trigonocystis, 150 

 Trigonodus, 452 

 Trigonosemus, 406 

 Trigonotarbus, 791 

 Trigonotreta, 410 

 Trigonulina, 409 

 Triloculina, 38 

 Trimerella, 373 

 Trimeres, 612 

 Trimerocephalus, 726 



Trimeroceras, 612 

 Trimerocystis, 154 

 Trimerus, 724 

 Trimorion, 612 

 Trinacria, 442 

 Trineynacystis, 152 

 Trinucleus, 711, 711 

 Triodonta, 474 

 Triplecia, 387 

 Tripleuroceras, 610 

 Triplosoba, 808 

 Tripneustes, 282 

 Triptera, 571 

 Tripylus, 296 

 Triton, 555 

 Tritonalia, 558 

 Tritonidea, 556 

 Tritoniuvi, 555 

 Trivia, 554 

 Trochalia, 548 

 Trochammina, 26 

 Trochamminoides, 26 

 Trochiliopora, 326 

 Trochiscolithus, 112 

 Trochoceras, 605 

 Trochocrinus, 194 

 Trochocyathus, 94 

 Trochocystites, 150 

 Trochoderma, 313 

 Trocholites, 600 

 Trocholitoceras, 600 

 Trochonema, 530 

 Trochoseris, 102 

 Trochosmilia, 99 

 Trochotoma, 525 

 Trochus, 531 

 Troostocrinus, 170 

 Tropaeum, 653 

 Trophon, 558 

 Tropiceltites, 640 

 Tropidocaris, 752 

 Tropidoleptus, 385 

 Tropidomya, 470 

 Tropidopora, 344 

 Tropites, 638 

 Truncaria, 557 

 Truncatula, 323 

 Truiicatulina, 33 

 Tryblidium, 521 

 Tschernyschewia, 390 

 Tubina, 541 

 Tugonia, 499 

 Tulotoma, 544 

 Turbina, 531 

 Turbinaria, 108 

 Turbinella, 560 

 Turbinilopsis, 539 

 TurUnocrinus, 190 

 Turbinolia, 94 

 Turbo, 528 

 Turbonellina, 531 

 Turbonilla, 537 

 Turbonitella, 539 

 Turnus, 501 

 Turonia, 55 

 Turricula, 560 

 Turrilepas, 744 

 Turrilites, 654 

 Turris, 563 

 Turritella, 546 

 Turritoma, 525 

 Turtonia, 488 

 Tuzoia, 750 

 Tyleria, 467 

 Tylocrinus, 195 

 Tylopoma, 544 

 Tylopterus, 783 

 Tympanotoma, 550 

 Typhis, 558 

 Tyrbula, 799 



Udora, 761 

 Udorella, 761 

 Uintacrinus, 236 

 Ulangia, 98 



Ulocrinus, 224 

 Ulrichia, 738 

 Umbonium, 532 

 Umbraculum, 568 

 Umbrella, 568 

 Umbrellina, 321 

 Uncinella, 413 

 Uncinulina, 398 

 Uncinulus, 397 

 Uncites, 413 

 Undularia, 536 

 Ungula, 371 

 Ungulina, 487 

 Ungulites, 371 

 Unicardiuni, 484 

 Unicrisia, 318 

 Unicytis, 323 

 Unio, 454 

 Uniocardium, 490 

 Unionia, 452 

 Unitrypa, 341 

 Uperocrinus, 196 

 U'phantaenia, 61 

 Uranoceras, 608 

 Urda, 758 

 Urechinus, 294 

 Uronectes, 756 

 Ussuria, 637 

 Uvanilla, 528 

 Uvigerina, 31 



Vaginella, 571 

 Vaginoceras, 595 

 Vaginopora, 353' 

 Vaginulina, 30 

 Valenciennesia, 573 

 Valletia, 478 

 Valvata, 544 

 Valvatina, 570 

 Valvulina, 29 

 Vanuxemia, 442 

 Vasocrinus, 218 

 Vasseuria, 683 

 Vasum, 560 

 Velates, 534 

 Velorita, 474 

 Veloritina, 474 

 Venericardia, 475 

 Venerupis, 494 

 Veniella, 472 

 Venilicardia, 472 

 Ventriculites, 65, 71 

 Venus, 492 

 Vermetus, 546, 546 

 Vermiceras, 655 

 Vermicularia, 546 

 Verneuilia, 412 

 Verruca, 746 

 Verrucocoelia, 64 

 Verruculina, |59 

 Vertebralina, 39 

 Verticordia, 469 

 Vertigo, 576 

 Vertumnia, 448 

 Vesicomya, 491 

 Vestinautilus, 604 

 Vevoda, 438 

 Vexillum, 141 

 Vibracella, 351 

 Vicarya, 550 

 Villorita, 474 

 Vincularia, 350 

 Vinella, 317 

 Virgatites, 664 

 Virgularia, 110 

 Vitrinella, 532 

 Vitulina, 417 

 Viviparus, 544 

 Vlasta, 438 

 Vola, 457 

 Volborthella, 597 

 Volborthia, 370 

 Voluta, 561 

 Volutella, 561 

 Volutifusus, 561 



