92 HELICID^. 



Var. 2. vitrea. — Shell extremely thin. Carmarthenshire 

 (J. G. J.), Cork (Humphreys), B.C, Near Birmingham (G. 

 SherriffTye), y.C. 



Var. 3. solidula. — Shell much thicker, reddish-yellow. Dept- 

 ford, Wilts (J. G. J.), B.C. 



Dr. Gwyn Jeffreys now considers the variety vitrea 

 to be a distinct species, viz. the 5. virescens of More- 

 let. In his " Notes on some British Land and Fresh- 

 water Shells," which appeared in the * Annals and 

 Magazine of Natural History' for November, 1878, 

 he makes the following remarks : — " With respect, 

 however to 6". virescens of Morelet, ... I believe 

 it is distinct from any of the three species which I 

 have acknowledged as British, viz. piitris, elegans, 

 and oblonga. It should therefore be added to our 

 native fauna. This is my variety vitrea of S.piitris. 

 .... I lately found a specimen at St. Albans 

 with vS. ptitris, but unfortunately I had no time to 

 examine the animal further than by noticing that it 

 seemed to be of a darker hue than that of 6". putris 

 or elegans. Mr. Henry Groves has obligingly sent 

 me a specimen of the shell which he had collected 

 at Mitcham, in Surrey. . . . The shell is extremely 

 thin, and finely striated lengthwise ; the spire is 

 very small ; the last whorl disproportionately large, 

 and the mouth more open and expanded than in 

 any other European species. I regard it as the 

 5. virescens of Morelet, and not as his 5. debilis which 



Baudon names it Baudon's description of 



the animal of his 5. debilis differs from Morelet's 

 description of the animal of 5. virescens chiefly in 

 colour, the former being *gris jaunatre ' (yellowish- 



