INDEX OF GENERA. 



869 



Tethneus, m, II 416 

 Tetrabranchiata, II 39 

 Tetracoralla, I 54 

 Tetradella, f, II 353 

 Tetradium, n, I 99 

 Tetragonites, m, II 166 

 Tetragraptus, m, I 29 

 Tetranota, f, I 612 

 Tettigonia, f, II 457 

 Textularia, f, I 9 

 Thaleops, f, II 298 

 Thamniscus, m, I 150 

 Thecia, f, I 91 

 Thlibomenus, m, II 456 

 Thrincoceras, n, II 93 

 Thysanocrinus, m, II 547 

 Thysanoptera, II 444 

 Thysanura, II 443 

 Tingitidse, II 456 

 Tipula, f, II 455 

 Tirolites, m, II 156 

 Titanodictya, f, II 428 

 Titanoeca, f, II 416 

 Torellellidse, II 7 

 Tornatellsea, £, I 806 

 Tornatinidae, I 810 

 Tornoceras, n, II 135 

 Toxaster, m, II 599 

 Trachyceras, n, II 159 

 Trachydomia, f, I 674 

 Trachypora, f, I 95 

 Trachysagenites, m, II 160 

 Trapezonotus, m, II 456 

 Traskites, m, II 159 

 Trematis, f, I 201 

 Trematoceras, n, II 55 

 Treniatonotus, m, I 615 

 Trematopora, f, I 139 

 Trematospira, f, I 345 

 Treposella, f, II 356 

 Trepospira, f, I 648 

 Trepostomata, I 127 

 Triarthrus, m, II 286 

 Triblidium, n, I 603 

 Tribochrysa, f, II 451 

 Triboloceras, n, II 88 

 Trichiulus, m, II 419 

 Trichocnemis, f, II 450 

 Trichonta, f, II 455 

 Triccelocrinus, m, II 479 

 Trigonarca, f, I 407 

 Trigonia, f, I 483 

 Trigonostoma, n, I 798 



Trilobita, II 250 

 Trimerella, f, I 191 

 Trimeroceras, n, II 130 

 Trinucleus, m, II 258 

 Tripteroceras, n, II 103 

 Trochidse, I 702 

 Trocholites, m, II 71 

 Trochonema, n, I 669 

 Trochoturbinidae, I 667 

 Troostocrinus, m, II 478 

 Trophon, m, I 786 

 Tropidocaris, f, II 381 

 Tropidoleptus, m, I 305 

 Tropisternus, m, II 447 

 Tropites, m, II 161 

 Tropitoidea, II 160 

 Trox, m, II 447 

 Truncatulina, f, I 11 

 Trypodendron, n, II 446 

 Tubicola, II 235 

 Tudicla, f, I 764 

 Tulotoma, f, I 725 

 Tupus, m, II 438 

 Turbinella, f, I 781 

 Turbinellidse, I 781 

 Turbinolia, f, I 102 

 Turbo, m, I 676 

 Turbonilla, f, I 709 

 Turbonopsis, f, I 675 

 Turnus, m, I 577 

 Turrilepas, f, II 371 

 Turrilites, m, II 211 

 Turritella, f, I 729 

 Turritellidse, I 729 

 Tympanotonus, m, I 749 

 Typhis, m, I 786 

 Tyrbula, f, II 444 



Uintacrinus, m, II 567 

 Ulrichia, f, II 346 

 Uncinulus, m, I 290 

 Unio, m, I 479 

 Unitrypa, f, I 145 

 Urosalpinx, f, I 784 

 Urotheca, f, II 9 

 Ussuria, f, II 164 



Vaginoceras, n, II 41 

 Valvata, f, I 724 

 Valvatidse, I 724 

 Vanikoropsis, f, I 715 

 Vanuxemia, f, I 412 

 Vasum, n, I 782 



Velatella, f, I 707 

 Venericardia, f, I 544 

 Veniella, f, I 538 

 Venus, f, I 563 

 Vermes, II 234 

 Vermetus, m, I 737 

 Verneuilina, f, I 10 

 Vespidae, II 449 

 Vexillum, r\, II 247 

 Vicarya, f, I 738 

 Vinella, f, I 118 

 Virgatites, m, II 190 

 Vitulina, f, I 351 

 Viviparidse, I 725 

 Viviparus, m, I 725 

 Vola, f, I 497 

 Volborthella, f, II 39 

 Voluta, f, I 794 

 Volutidae, I 790 

 Volutilithes, m, I 790 

 Volutomorpha, f, I 792 

 Volvula, f, I 810 

 Vorticifex, m, I 817 



Waagenoceras, n, II 147 

 Walking-sticks, II 444 

 Wasps, II 449 

 Water bugs, II 456 

 Wax-bugs, II 456 

 Westonia, f, I 193 

 Whiteavesia, f, I 517 

 Whitella, f, I 414 

 Whitfieldella, f, I 346 

 Wilsonia, f, 1 293 

 Woodocrinus, m, II 511 

 Worthenia, £, I 639 

 Worthenopora, f, I 164 



Xenophora, f, I 723 

 Xenophoridae, I 723 

 Xiphosura, II 399 

 Xylobius, m, II 419 



Yoldia, f, I 402 



Zacanthoides, m, II 273 

 Zaphrentis, f, I 56 

 Zetobora, f, II 445 

 Zitteloceras, n, II 76 

 Zonitidae, I 822 

 Zophocrinus, m, II 474 

 Zygoptera, II 450 

 Zygospira, f, I 307 



