264 GIBBONS : ON HELIX HORTENSIS V. ARENICOLA. 



S. angiistatiis A. Ad., was described from specimens in the 

 Cumingian Collection. At the present time I can find no shell 

 with that name attached to it, but one tablet with two specimens 

 upon it is labelled radiata A. Ad. These I take to be the types 

 of aii-giistatus^ and presume that the label is merely an error of 

 memory or a lapsus calami. This supposition is to some extent 

 confirmed by A. Adams, who places his species as a synonym of 

 (elongatus) the true Scutus aiiatiuics, and the shell figured pi. xiv., 

 f. 21, is one of those which I presume are his types. The apex 

 is more anterior than in the typical iinguis and the form is a trifle 

 broader. 



HELIX HORTENSIS var. ARENICOLA. 

 By J. S. GIBBONS, M.B. 



This very distinct variety appears to have been ignored by 

 Jeffreys and other writers on British land shells. Some time ago 

 I received Bristol specimens from Miss Hele, under the name of 

 H. fasciata-pellucida^ agreeing exactly with shells collected at the 

 original station near Aberdeen. As there can be no doubt about 

 its occurring in other places besides the two mentioned above, I 

 reproduce Macgillivray's description: — "Shell subglobose, very 

 " thin, diaphanous, hyaline, with five opaque white bands, the 

 "epidermis thin, pale sulphur-yellow; the peristome thin, with 

 "an internal opaque white rib." (Moll. Aberdeen, p. 83). I 

 have not been able to detect the faint alliaceous odour mentioned 

 by Macgillivray. 



August 20th, 1878. 



J.C.. ii., Sept., 1879 



