554 GENERA Ef SUBGENERA. 



Toxostoma Rafin. Enum. et Acc. leste F6r. in Bull. zool. 1835. p. 93. — Gen. 



Hclicidarum ex typo non designato. An idem ac sequens? 

 Toxotrema Rafin. in Journ. pliys. 1819. v. 88. p. 425. — Genus Helicidarum 



minus cognitum. 

 Tragomma Held in Isis 1837. p. 916. — Genus Helicum ex typo Hei. algirae L. 

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

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



secliones: Tridopsis , Isognomostoma , Stenotrema, Mesodon. 

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



volutae, a Charpentier, Hartmann et Gray inter subgcnera Helicis 



adoptatum. 

 Triodopsis Rafin. in Journ. de phys. 1819. v. 88. p. 425. — Novum genus He- 



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

 Trochiscus Held in Isis 1837. p. 915. — Genus Helicum ex lypo Hel. bidenlis. 

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



Typi: Hel. elegans, thiarella etc. 



ITrocopiis B e c k ind. p. 83. — Subgenus Pupae. 

 = Cylindrellae sp. 



Vallonia Risso hist. IV. p. 101. — Genus Paludin"darum , quod ex Helice 



pulchella Miill. formatum videtur. 

 Vediantius Risso hist. IV. p. 8t. — Genus Helicidarum , perperam pro pullis 



Achatinae folliculi formatum. 

 Vertigo Miiller vid. Monogr. vol. I. Introd. p. XXIII. 



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

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

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



=3 Vitrina Drap. 

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



lHerophila Held in Isis 1837. p. 913. — Genus Helicum ex typis Hel. pisanae, 



ericetorum etc. 

 Xofo/re;na Rafin. in Journ. de phys. 1819. v. 88. p. 423. — Genus ab Helice 



disjunctum ex typo Hel. lunulae Raf. 



Xebrlna Held in Isis 1837. p. 917. — Genus Bulimorum e typis Bul. detrili, 



fasciolati elc. 

 Zonites Montf. Conch. sysl. II. p. 282. — Genus ab Helice separatum, a Beck 



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

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



stitutum. 

 Zonites 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. 

 Zua Leach moll. bril. p. 114, teste Turt. et Gray. — Genus novum ex typo 



Helicis lubricae Miill. conslilutum , a Gray inter genera Helicinorum 



adoptatum. 

 Zurama Leach nioU. bril. p. 108, tost. Turl. cl Gray. — Genus ex lypo Hel. 



pulchellae Miill. formatum, a Gray inter subgenera Helicis adoplatum. 



