VITREA 183 



1908. Hyalinia {Polita) radiatula (Alder) : Taylor, Monog. 

 Moll. Brit. Is. [iii], p. 87, pi. xv. 



[Germain {Moll. France, ii, 1913, p. 67) calls this species 

 hammonis, and gives as synonyms : — H. viridula, 

 Menke [which = pura] and H. subradialula, Fagot.] 



[*^* The identity of H. petronella, Charp., with this 

 species is very doubtful.] 



First recorded as British in 1821, by J. E. Gray, as 

 " Helix Zonites striatula, Drap." {See ref. above.) 



British Distribution in Time : Pleistocene to Recent. 



Genus : 3. VITREA, Fitzinger. 



Etym. : — Lat. vitreus, glassy. 



Type •.—Helix diaphana (Studer) Fitzinger. 



{Helix, Zonites, vett. auctt.) 



1821. Helicella, Lam. [pars] : Ferussac, Tabl. syst. Limagons, 

 Jan. ed., p. 41 (June ed., p. 37). 



1833. Discus [pars. Err. typ. ?] : Fitzinger, Beitr. Lmidesk. 

 Oesterr., iii, p. 99. 



1833. Vitrea : Fitzinger, I. c. 



1837. Hyalinia, Ag. (Msc.), subg. 9 of Helix [pars] : Char- 

 PENTiER, Neue Denkschr. Ally. Schweiz. 

 Gesell, i [no. 2], p. 13. 



1837. Polita [pars] : Held, Isis, xxx, hft. 12, col. 916. 



1850. Hyalina, Fer., subg. 3 of Helix [pars] : Albers, Heliceen, 

 p. 66. [Non Ferussac, who used " HyaHnse " 

 as the name for a group of his subg. Helicella.] 

 [Non Hyalina, Schumacher, 1817 {Marginel- 

 lidcB); nee Studer, 1820 {Vitrina).} 



(Crystallus, subg. of Helix : Lowe, Proc. Zool. Soc. 

 Lond., 1854, p. 178. [Kobelt by an error 

 (Rossmassler's Icon., xi, p. 148) cites the 

 date for this name as " 1833."] 

 1855,) Aplostoma, subg. Ill of Zonites [pars] : Moquin-Tandon, 

 Sept./ Hist. Moll. France, ii, p. 72. 



1. Vitrea crystallina (IMucUer). 



Etym. : — Gr. Kpi'crraAAivos, made of crystal. 



1774. Helix crystallina : Muller, Verm. Hist., ii, p. 23. 



1789. Helix Chrystallina, Muller : Studer, in Coxe, Trav. in 



Siritzld., iii, p. 384. 

 1791. Helix crystallina, iMiill. : Gmelin, Linn. Syst. Nat., 



ed. 13, i, pt. 6, p. 3635. 

 1801. Helix crystallina. Mull. : Draparnaud, Tail. Moll. 



France, p. 97. 



