A PROPOSED CLASSIFICATION OF THE GENUS HELIX. 345. 
2. Lap simple. 
H. perspectrva (Say).—Whorls about 6, striated across, with 
raised parallel acute lines, forming strongly impressed sulcze (furrows): 
between them ; shell brownish; umbilicus very large. Paris, Upper 
Canada. 
H. striaTeLLa (Anthony).—Whorls over 4, rounded, regularly 
striated with rather strongly raised lines; shell light yellowish brown; 
aperture thin and brittle; resembles perspectiva, but is much smaller, 
has fewer whorls, is lighter in color, and the umbilicus does not ex- 
hibit the whorls as plainly as in that species. Canada. 
Sus-Sec. C.—Shells large, umbilicus not exhibiting all the whorls. 
1. Lip reflected. 
H. cxavusa (Say).—Illinois and Pennsylvania. 
2. Lip simple. 
H. rnornata (Say ).—Pennsylvania. 
Sus-Sec. D.—Shell small, umbilicus not exhibiting all the whorls. - 
1. Lap reflected. 
H. putcHetta (Miller).—Whorls about 4, rounded, striated ; 
‘aperture circular ; labrum reflected, flat, and white; umbilicus round, 
large, and profound ; breadth about ¢ inch. Canada. 
The small size and reflected lip will readily distinguish this shell 
from all other species found in Canada. 
2. Lip simple. 
H. porcina (Say).—Whorls over 4, depressed above, rounded: 
beneath ; shell depressed, yellowish brown; epidermis rugose ( ) 
with minute very numerous bristles ; umbilicus rather small, profound ;. 
breadth over ;3, inch. H. hirsuta (Binney) is identical with this 
species (Bland). Garafraxa, County of Wellington, U. C. 
H. rigera (Say).—Whorls over 6, all except apical one, wrinkled 
across ; shell pale yellowish horn color, polished, body whorl pellucid, 
yellowish white, opaque beneath the aperture ; spire but little raised ; 
umbilicus very small; breadth about ;3, inch. Toronto. 
H. arsorea (Say).—Whorls 4, irregularly wrinkled across ; shell 
very thin, fragile, horn color, pellucid; lip thin, brittle ; umbilicus 
large and deep; breadth + inch. Canada. 
H. warpa (Say).—Whorls 4, with numerous raised, equal, acute 
lines across, the spaces between them flat and wrinkled ; shell conic, 
reddish brown; aperture truncated by the penultimate whorl (the 
whorl preceding the body whorl) ; spire very much elevated ; umbili-- 
Vou. VIII. 2A 
