24 BOOK OF SPECIES. 
H. nortensis. Differs from the last by 
the whiteness of its margination. B. Diam. 3. 
T. 24. 
H. pisana. Globose and depressed, per- 
forated, thin, whitish, and painted with inter- 
rupted yellowish and brown bands; lip simpie ; 
inner margin pink. B.2...3. TT. 3]. 
H. ericetorum. Orbicular-depressed, um- 
bilication shewing the whole of the whorls, 
slightly striated, whitish, with brown bands; lip 
simple. 2. .;%., 1.:3/- 
H. CARTHUSIANELLA. Orbicular - convex, 
depressed, perforated, smooth, pellucid, whitish 
horn-colour, obscurely banded ; lip with its inner 
margin brown, its outer white and sub-reflected ; 
diam: =. »B.:, T..26. 
H. cartTausiana. Orbicular-convex, de- 
pressed, perforated, smooth, pellucid, white or 
grey; spire short; margin of lip sub-refiected ; 
CR Rd bea 
H.ceLutaria. Umbilicated, slightly striated, 
pellucid, glossy, with five depressed yellowish 
whorls ; base white; lip simple, acute; diam. 7. 
Bic a AaD. | 
H.nitipa. Flattened, orbicular, umbilicated, 
thin, pellucid, minutely striated, brownish horn- 
colour ; lip simple, acute; diam. 3. B. T. 38. 
H. uisprpa. Convexly orbicular, sub-de- 
