38 HELICIDJE. 



H. HISPID A. Linnaeus. PI. VI, fig. 7. 



Convex, reddish or brownish horn colour ; umbilicus moderately 

 large. 



With the exception of some of the Pisidia, this is by 

 far the most difficult species to say what are its true 

 limits. Under the name are now included the three 

 distinct species of Gray, hispida, concinna, and depi- 

 lata. There is such a difference in the appearance and 

 thickness of the shell that it is very difficult to recon- 

 cile them as being the same species. The real hispida 

 may be readily distinguished by being thin, and having 

 the periojtraca hairy. It most nearly resembles sericea, 

 but is of a darker colour and rather more depressed ; 

 the animals also are quite distinct. 



var. DEPILATA. Shell particularly hard, rather 

 smaller, of a horn colour, more depressed, peristome 

 thickened and of a whitish colour. 



It seems to prefer a sandy situation, and is sometimes 

 very abundant on the hillocks near the sea coast. 



var. CONCINNA. Shell more nearly approaching 

 hispida, and found in similar situations, it differs from 

 it however in having a thicker shell, larger umbilicus, 

 generally more depressed, and is destitute of hairs. 



Hab. Woods, either under stones, or climbing up 

 plants and grasses. Common almost everywhere. 



H. REVELATA. FeTUSSaC. PI. VI, fig. 22. 



Shell globular, thin, diaphanous, shining, pale green colour, downy; 

 umbilicus small. 



This shell is by no means common, having been 

 found in a comparatively few places. It is not quite 

 so large as sericea, which it most nearly resembles in its 

 general contour, though it may always be distinguished 

 by its peculiar green colour. About a quarter of an 

 inch in diameter. 



Hab. The recorded localities are near Doyle's Mon- 

 ument in Guernsey, Torquay, Plymouth, and other 

 places in Devon and Cornwall. 



