HYVALINIA. AT 
2.12 He HEGMERICAn(Szezss) 27, El LN, £6, 
[=H. GLABRA (sa00th) Jeffr. non Studer). 
Convex above and beneath, very glossy and smooth, rather dark 
transparent horn-colour, very slightly marked with white below ; 
sptre raised and produced to a point ; outline of sozth forming about 
three-quarters of a circle ; whorls 5-63 zmbzlicus deep, but narrower 
than that of cel/arza and not showing the last whorl. Azzmal 
with a black mantle showing a distinct black band through the shell. 
~~ 51mm. 52.95 mm. 
Investigation has at last settled the dispute as to 
what the species we have been accustomed to call glaber 
was called on the continent. It appears to be the /ed- 
vetica of Draparnaud, as Mr. Taylor had suspected many 
years ago. 
This is a local species, though, as it is becoming better 
known, its distribution is found to be wide, extending 
over Great Britain as far north as Argyle and the Clyde 
Isles. ‘There are no records for Ireland or Isle of Man; 
it is however found in the Channel Isles. Though 
known to Dr. Gray and figured by him in 1841 as a 
wanicty “of a/iarza, it}; was. left. to Mr’ 'T:. Rogers, ‘of 
Manchester, to bring it into notice in 1870. 
Many seem to confuse it with a//zaria, and it has been 
considered by some authorities.to be merely a variety of 
that species. There are, however, some very distinct 
differences between the two English forms. The adult 
helvetica is, of course, much the larger and is thinner in 
proportion to its size; but the distinction that I believe 
