CHILOTREMA 247 



1840. Trifjonostoma ohvolutnm : Hartmann, Gastropoden, p. 14, 



pi. vi. 

 Post \ Helix {T riijonostoma) ohvolula, Miillcr : Brown, lllust. 

 Sept. - ■ Conch. Brit., cd. 2, p. 53, pi. xviii*, f. 13 



1840. J & 14. 



1845. Helix {Trigonosloma) obvoluta, Miiller : Brown, lllust. 



L. <& F.-W. Conch. Brit., p. 87, pi. ix, f. 16 



&17. 

 1847. Helix {Euphemia) obvoluta, Mull. : Beck, AmiJ. Bcr. 24. 



Versamm. Dcutsch. Naturf., p. 122. 

 1847,^ Iherus {Trigonostoma) obvoluta : Gray, Proc. Zool. Soc. 

 Nov. J Land., 1847, p. 172. 



1850. Polygyra obvoluta : M. E. Gray, Fig. Moll. Anim., iv, 



pi. 290, f. 15 (explan.). 

 1850. Helix (Gonostoma) obvoluta, Miill. : Albers, Heliceen, p. 94. 

 1852. Helix obvoluta, Miiller : Forbes & Hanley, Brit. Moll., 



iv, p. G3, pi. cxvii, f. 1-3. 

 1855,) Anchistoma (Polygyra) obvolutum, Miill. : H. & A. Adams, 

 June./ Genera Moll., ii, p. 207. 



1855,\ Helix {Trigonostoma) obvoluta, ]\Iiill. : Moquin-Tandon, 

 Sept./ " Hist. Moll. France, ii, p. 114, pi. x, f. 26-30. 



1855,\ Helix {Polygyra) obvoluta, Miill. : Pfeiffer, MalaJc. 

 Nov. j ^Bldtt., ii, p. 136. 



1857. Helix {Trigonostoma) obvoluta, Miiller : Gray, Turton's 



Manual, new ed., p. 116, pi. xi, f. 131. 



1862. Helix obvoluta, MUller : Jeffreys, Brit. Conch., i, p. 229 ; 



V, pi. xiv, f. 3. 



1863. Helix obvoluta, Miiller : Reeve, L. & F.-W. Moll. Brit. 



Is., p. 73, figs. 

 1871. Helix {Anchistoma) obvoluta, Miill. : Kobelt, Cat. Europ. 



Binnenconch., p. 9. 

 1886. Anchistoma {Gonostoma) obvoluta, Miill. : Pollonera, 



Mem. Accad. Sci. Torino, Ser. II, torn. 



xxxviii, 1888, p. 35. (Reprint, 1886, p. 13.) 

 1902. Gonostoma {Helicodonta) obvoluta, Miill. : Westerlund, 



Rad Jugoslav. Akad., cli, p. 90. 



First recorded as British in 1763, by R. Brookes {Nat. 

 Hist., iv, p. 302), from, it would seem, dead shells 

 reported at " Charlton forest in Sussex." 



British Distribution in Time : Pleistocene to Recent. 



Genus : 11. CHILOTREMA, Leach. 



Etym. : — Gr. ;^£t\os, a lip, and rpijixa, a hoh'. 

 Type : — Helix lapicida, Linna'us. 

 (Helix, Cochlea, etc., vett. auctt.) 



1807. Pleurodonte [pars] : Fischer von Waldheim, Mus.- 

 Demidorff, iii, p. 229. 



