HELIX.— Plate CLXVI. 



iurd depresta, lunari ; periiiomate recto, simpUci, 



acuio. 

 The uotNDED Helix. Shell pcrspectively umbilicatcd, 



tlepressed, closc-spired, horny- ycUow, red-spotted, 



finely rib-like striated ; spire convex ; whorls si.\ to 



seven, flattened, the last angled ; apertare depressed, 



lunar ; lip straight, simple, sharp. 

 MoLLEK, Hist. Verm. vol. ii. p. 29. 



Helix radiata, Pa Costa. 



Helix Turtoni, Fleming. 



Zonites rotundatui. Gray. 

 Hob. Britain, Germany, France, Sweden. 



A flattened subdiseoid shell, with an open perspective 

 umbilicus, spotted and streaked with red. 



Species 1117. (Mus. Cuming.) 



Helix fclv.\. Hel. testa imperforatu, turhinato-globosd, 

 corned, miniitissime striatuld, nitidd ; tinfraclihm sex, 

 coHvexis, angustissimis, ultimo basi convexiuscuh ; 

 aperlurd depressd, lunari ,■ peristomate recto, simplici, 

 acuto. 



The fulvods Helix. Shell imperforated, turbinately 

 globose, horny, very minutely finely striated, shin- 

 ing ; whorls six, convex, very narrow, the last rather 

 convex at the base ; aperture depressed, lunar ; lip 

 straight, simple, sharp. 



McLLER, Hist. Yerra. vol. ii. p. 56? 

 Helix trochifortnis, Montagu. 

 Helix trochtdus, Dillwyn. 



Helix chersina, Say. 

 Hel'u Mandralinci, Bivon. 

 Helix Morloni, Jeffreys. 

 Hab. Europe and Xorth America. 



A small glassy trochus-shaped species, not umbilicated. 



Species 1118. (Mus. Cuming.) 



Helix lamellat.v. Hel. testa umbilicatd, coiwideo-glo- 

 bosd, mendiranaceo-costuUtld, sericind, corned ; anfrac- 

 tibus quinque, subtqualibus ; aperlurd depressd, lu- 

 nari ; peristomate nimplici, recto, acuto. 



Tue lamellated Helix. Shell umbilicated, conoidly 

 globose, membranaceously fine-ribbed, silky, horny ; 

 whorls five, nearly equal ; aperture depressed, lunar ; 

 lip simple, straight, sharp. 



Jeffheys, Trans. Linn. Soc. vol. xvi. p. 333. 

 Helix Scarbiirgensii, Turton. 

 Helix seminulum, Rossmasler. 



Hai. Britain and Ireknd. 



A small, delicately transparent, globosely turbinated 

 sheU, encircled throughout with verj' fine membranaceous 

 lamella;. 



Species 1119. (Mus. Cuming.) 



The shell here figured is the H. radiaiula. Alder {Zonites 

 radiatnlm, Gray), but Dr. I'fciffer considers it to be only 

 a more distinctly striated variety of H. pura. 



