HELIX. 187 



Helix radiata, Lister (Europe and Virginia), of Bosc, Hist. IV, 32, 

 appears to be H. altematu, as reference is given to Lister's figure of 

 that species. 



Helix trivolvis, Eaton (ZooL Text-Book, p. 19i) =Flanorbis. 



Helix bicarinatus (J,d. 194) = Planorbis. 



Helix parvus {id. 195) = Planorbis. 



Helix catascopius {id. 195) = Limncea. 



Helix heterostrophus {id. 195) = Phi/sa. 



Helix subcarinatus {id. 195) = Lioplax. 



Helix virginica {id. 195) =. Melania. 



Helix vivipara {id. 196) = Vivipara contectoides. 



Helix decisa {id. 196) = Melantho. 



Helix cumberlandicus, Lea, of Wheatley's Cat. U. S. p. 18, is the same, 

 I presume, as H. cumberlandiana. 



Helix immitissima, Lea, of the same, p. 19^^. minutissima? 



Helix pallida, Say, of same = //. palliata. ? 



Helix depicta (Gratelocp, Soo. Lin. Bordeaux, XI, 399, pL i, f. 12, 

 1839). — Shell subglobose, conic, imperforate, 

 thin, white, very delicately striate, orna- 

 mented with varied lines and interrupted 

 bands ; lip simple, acute. 



This pretty shell has some points of re- 

 semblance with Helix pisana, Miill., but is 

 smaller and not umbilicated. The internal 

 edge of the right lip is white instead of rose. 

 The upper surface is covered with numerous Helix depicta. 



yellowish-brown bands, more or less deep, 



interrupted by oblique lines of same color. Five whirls. Height 

 11, diam. 15 mill. 



Island of St. Thomas ; New Orleans. 

 Helix pisana, Mctller, United States. — Fekctssac, Tabl. Syst. 119. — Gray, 



Turton's Manual.— Forbes, Brit. Ass. Rep. 1840, 145.— See Bost. 



Journ. Ill, 489. This species is not known to exist in America at 



the present day (1864). 

 Helix «ru/niMWi,LiNSLEy, Shells of Conn. (Sill. Journ. [i],XLVIII, 280),= 



Skenea serpuloides. See Terr. Moll. IV, 125, 

 Helix pellucida, Fabricius = Vifrina anyelicce. 

 Helix arbustonm. See Terr. Moll. IV, 124, and Adams, Cat. Cabinet, 32. 



Does not inhabit America. 

 Helix hieroghjphica, Beck, Ind. Am. Sept. ? See Terr. Moll. IV, 124. 

 Helix domeslica, Strom. See Vitrina amjelicce. 

 Helix dealbata, SkY =: Bulimiihis. 

 Helix corpuloides. See Terr. Moll. IV, 124. 

 Helix bonplandi, Lamarck. See Terr. Moll. IV, 124. Jay, Cat. ed. 2, 



33. Tennessee. 

 Helix haliotoides, Fabricius, Fauna Griienl. 390 {IISO) = Siyaretus. 



