1 42 Mollusca. 



Thyca, H. et A. Adams. Gen. I. 372. 1858. (Capulus.) . . GASTEROPODA. 



Thyella, H. Adams in Proc. Zool. Soc. 754. 1865 BIVALVIA. 



Thylacodus, Guett. iu Mem. diff. Part. d. 1. Phys. 1776. . GASTEROPODA. 

 Thylacus, Conrad in Phil. A. N. S. J. IV. 290. 1860. GASTEROPODA. Foss. 

 Thylaeodus, Morch in Journ. Conch. VIII. 48. 1860. . . GASTEROPODA. 



Thyreopsis, H. Adams in Proc. Zool. Soc. 14. 1868 BIVALVIA. 



Thysanota, Albers in Heliceen. 2. A. 63. 1860. (Nanina.) GASTEROPODA. 

 Thysanoteuthis, Troschel iu Wiegm. Arch. XXIV. 1857. CEPHALOPODA. 



Tiara, Philippi in Haudb. 494. 1853. fUr Thiara GASTEROPODA. 



Tiarella, Philippi iu Haudb. 494. 1853. fur Thiarella. . . GASTEROPODA. 

 Tiedemannia, Ehrenberg in Berl. Ac. Mou. Ber. 1861. PTEROPODA. Foss. 

 Tifata, H. et A. Adams. Gen. II. 245. 1858. (Tralia.) . . GASTEROPODA. 

 Tigris, Troschelin Gebissd. Schueckeu. 5. 201. 1863. . . GASTEROPODA. 



Timoclea, Leach in Brit. Moll. (1818) 1844 BIVALVIA. 



Tisoa, Maroel de Serres. . . . ? CEPHALOPODA. Foss. 



Tivela, Linck in Beschr. Nat. Saml. Rostok. 1807. (Cjtherea.) BIVALVIA. 



Tomala, Gray in Syn. Brit. Moll. 1844 BIVALVIA. 



Tomichia, Benson in Anu. N. H. VIIL 377. 1851 GASTEROPODA. 



Tonicia, Gray in Proc Zool. Soc. 1847 GASTEROPODA. 



Torcula, GrayiuList. ofGen. 155. 1847 GASTEROPODA. 



Torellia, (Loven) Jeffreys in Brit. Conch. IV. 244. 1867. GASTEROPODA. 

 Tornatellaea, Conrad in Philad. Ac N. Sc Journ. IV. 294. 1860. 



GASTEROPODA. Foss. 



Tornatina, A. Adams in Sow. Thes. n.554. 1850 GASTEROPODA. 



Torquatella, Held in Isis. 919. 1837. = Pupilla, Leach. GASTEROPODA. 

 Tortulosa, Gray in List. of Gen. 177. 1847. (Brachypus.) = Cataulus, Pf. 



GASTEROPODA. 

 Trachelia, Pfeiffer in Mal. Bl. 179. 1855. (Cyliudrella.) . GASTEROPODA. 

 Trachia, Albers in Heliceen. 2. Ausg. 160. 1860. (Helix.) GASTEROPODA. 

 Trachycardium, Morch iu Cat. Yoldi. IL 34. 1853. (Cardium.) BIVALVIA. 

 Trachydermon, Carpenter in Philad. Ac N. Sc Proc. 59. 1865. (Chitou.) 



GASTEROPODA. 



Trachyteuthis, Meyer. . . . ? CEPHALOPODA. Foss. 



Tragomma, Held in Isis. 916. 1837. = Zonite*, Moutf. . GASTEROPODA. 



Trelania, Gray in Proc Zool. Soc 1867 . GASTEROPODA. 



Trematis, Sharpe. . . . 1847. = Orbicella, Orb. . BRACHIOPODA. Foss. 



Tresus, Gray iu Ann. Mag. N. H. 2. XL 42. 1853 BIVALVIA. 



Tretoceras, Salter iu Lond. Geol. Soc Quart. Jouru. XIV. 177. 1858. = Vi- 



ploceras, Salt CEPHALOPODA. Foss. 



Trevelyana, KelaartiuAnn. N.H. L 257. 1858 GASTEROPODA. 



Triboniophorus, Humbert in Geneve Soc Phys. Mem. XVII. 116. 1863. 



GASTEROPODA. 

 Tribulus, Klein in Tent. Meth. Ostr. 1753. (Purpura.) . GASTEROPODA. 

 Trichopedus. Swaiuson in Treat. Mal. 211. 1840. wahrsch. Druckfehler fiir 



Trichotropis GASTEROPODA. 



Tridachia, Deshayes in Journ. Couch. 137. 1857 GASTEROPODA. 



Trigoniluna, Chenu in Mau. II. 169. Druckfehler f. Trigonuliua. BIVALVIA. 

 Trigonocoelia, Nyst inB. A.Briix. II. 1835. = Limopsis, Sassi. BIVALVIA. 

 Trigonostoma, Vest. in Siebenb. N. W. Ver. Verh. XVIII. 193. 1867. 



GASTEROPODA. 

 Trigonulina, d"" Orbigny in Ram. d. 1. Sagra. Hist. N. Cuba. 1841. = Ver- 



ticordia, S. Wood BIVALVIA. 



Trigonodon, Conrad in Am. Jouru. Conch. I. 233 BIVALVIA. 



Triloba, Vest in Siebenb. N. W. Ver. Verh. XVIIL 1867. GASTEROPODA. 



