CONCHOLOGIA CEST-RICA. 39 
Z. ligerus, SAY. 
ielsen higera; Saye) four: Acad: \ Phila. He S., IT, 
1821. 
Shell sub-globose, obtuse, brownish-yellow above, 
paler beneath; whorls 6—7, oblique-striate ; 
aperture lunate; lip acute, with a strong 
deposit within the margin, near its base; 
Z. ligerus. 
[B. & B.] 
Fig, 50. 

umbilicus very small, or none. H. 6-8, W. 
I1-15, mill. 
Station, in woods. Chester County; not 
common. 
Z. demissus, BINN. 
Helix demissa, Binn., Bost. Jour. Nat. Hist., IV., 
1843. 
Shell depressed, yellowish, thickly striate ; Za Seis 
base somewhat flattened, smooth; aperture Fig. 51. 
sub-transverse, compressed-lunate ; umbilicus 
very small; lip acute, thickened within the 
margin. H. 6, W. 10-12, mill. 
Station, in mountainous districts. Western 
Pennsylvania. 

Z. gularis, Say. 
ilehixy sularis, Say, Jour, Acad. ..Phila. F. S.,. IL, 
1822. 
Shell depressed-conical, shining, dusky- —_z, gutaris. 
yellow; whorls 7-8, very minute at the zs ae 
ig, 52, 
apex; aperture transverse; lip thickened 
within, at base, with one, or more, elon- 
gated, lamelliform, teeth ; one at the base, 
the other more central ; umbilicus covered, 
or very small. H. 5-7, W. 7-0, mill. 
Station, under wet logs, and decayed leaves. Lan- 
caster County, Pennsylvania. 

