554 GENERA ET SUBGENERyV. 



Toxostoma Rafin. Enum. et Acc. leste ¥ 6t. in Buli. zool. 1833. p. 93. — Gen. 



Helicidarum ex typo non designato. An idem ac sequens? 

 Toxotrema Rafin. in Journ. phys. 1819. v. 88. p. 423. — Genus Helicidarum 



minus cognitum. 

 Tragomma H el d in Isis 1837. p. 9 1 6. — Genus Helicum ex lypo Hel. algirae L. 

 Trichia Hartm. Erd- u. Sussw. Gast. — Subgenus Helicis. Typus: H. liispida. 

 Tridopsis Beck ind. p. 22. — Subgenus Helicis e seclione planilabrium. Sub- 



sectiones: Tridopsis , Isognomostoma , Stenotrema, Mesodon. 

 Trigonostoma ¥ilz. Syst. Verz. p. 97. — Genus Helicoideorum ex typo Hel. ob- 



volutae ,aGharpentier,Hartmann etGray inler subgenera Helicis 



adoptatura. 

 Triodopsis Rafin. in Journ. de phys. 1819. v. 88. p. 423. — Novum genus He- 



licidarum. Typus: Hel. clausa Raf. teste Fer. 

 Troclmcus Held in Isis 1837. p. 913. — Genus Helicum ex typo Hel. bidentis. 

 Turricula Beck ind. p. 10. — Subg. Helicis e sectione intusmarginalarum. 



Typi: Hel. elegans, thiarella elc. 



WTrocoptis Beck ind. p. 83. — Subgenus Pupae. 

 = Cylindrellae sp. 



Vallonia Risso hist. IV. p. 101. — Genus Paludinidarum , quod ex Helice 



pulchella MuU. formatum videtur. 

 Vediantius Risso hist. IV. p. 81. — Genus Helicidarum , perperam pro pullis 



Achatinae folliculi formatum. 

 Vertigo Mtiller vid. Monogr. vol. I. Inlrod. p. XXIII. 



Vilrea Fitzinger Verz. p. 99. — Genus Helicoideorum. Typus: H. hyalina. 

 Vitrina Drap. Tabl. p. 33. 98: vid. Monogr. vol. I. Introd. p. XIII. 

 Vitrinus Mon l f . Conch. syst. II. p. 238. 



=: Vitrina Drap. 

 Vorlex Beck ind. p. 29. — Subgenus Helicis e sectione reflexilabrium. 



J£erophila Held in Isis 1837. p. 913. — Genus Helicum ex typis Hel. pisanae, 



ericetorum etc. 

 Xolotrema 'Rafm. in Journ. de phys. 1819. v. 88. p. 423. — Genus ab Helice 



disjunctum ex lypo Hel. lunulae Raf. 



Xebrhia Held in Isis 1837. p. 917. — Genus Bulimorum e typis Bul. detriti, 



fasciolati elc. 

 Zoniles Monlf. Conch. syst. II. p. 282. — Genus ab Helice separaluni, a Beck 



inter subgenera Helicis adoptalum. Typus: Hel. algira L. 

 Zonites Leach moll. brit. p. 103, teste Gray. — Genus pro H. ericetorum con- 



stilutum. 

 Zoniles Gray Manual p. 110. 164. — Genus Helicinorum latius definitum. Typi: 



Hel. cellaria, pymaea, rotundata etc. 

 Zonites Swains. Malac. p. 331. — Subgenus Helicis ex typo Hel. cilrinae. 

 Zwrt Leach moll. brit. p. 114, teste Turt. et Gray. — Genus novum ex typo 



Helicis lubricae Mull. constitutum , a Gray inlcr genera Helicinorum 



adoptatum. 

 Zurama Leach moll. brit. p. 108, test. Turl. cl Gray. — Genus ex lypo Hel. 



pulchellae Muil. formatum, a Gray inter subgenera Helicis adoptatum. 



