CONCHOLOGIA CES ERICA: 
27 
_ Oss. — Our largest Helix. In some localities it has a 
tooth on the pillar lip. 
Lingual Dentition of M. 
albolabris, — | Morse. | 
a Fig. 17, 
M. Sayii, BInn. Pe 
Helix diodonta, Say, Long’s Ex- 
ped. Is, 1324.  Sayii, Binn., Bost. 
Jour. Nat. Hist., III., 1840. 
Agow 
\ 
M. Sayii.—[B. & B.] 
Fig, 18, 
Gy 
aul 

\W.| 
) 
Shell depressed-orbicular ; whorls 
5-6, obliquely striate ; aperture sub- 
orbicular; lip narrowly reflected, 
white, and with a tubercular tooth 
at base; pillar lip toothed; umbili- 
cus narrow, deep; pale horn color. 
H. 15, W. 22, millimeters. 
Station, in forests, Western Penn- 
sylvania. 
po) 
Syn? 
) ¥ 
ys 
) x 
== 
aN 
eg 
\ 
| 
M. Pennsylvanica, GREEN. 
Helix Pennsylvanica, Green, Cont. 
Maclin Lye, Now 1;/1827- 
| 4 
/ 
AL 
M. Pennsylvanica. —[B. & B.] 
Fig, 19. 

“etesday 
Shell turbinate, sub-globose, ob- 
liquely striate, with elevated ridges ; 
whorls 6, convex; aperture sub-tri- 

