40 CONCHOLOGIA CESTRICA. 
whorls 3-4, strongly oblique-striate ; suture lightly im- 
pressed; aperture rounded, or transverse; umbilicus 
Lingual Dentition of PB. striatella.—([Morse.] 
Fig, 73 
_ os aAO NNT IO 

9 09 29 
expanded, shallow; lingual membrane with 100 rows 
of 16-1-16 teeth, each; buccal plate arcuate, surface with 
converging striz, and irregular notches on the concave 
margin. H. 2%, W. 5, mill. 
Station, under decayed bark, and leaves. New Gar- 
den, Chester County ; frequent. 
Sub-genus STROBILA, Morsg, 1864. 
Animal of Strobila labyrinthica.—|Morse.] 
Fig, 74, 

IM 
Shell very small, turbinate, with revolving laminated 
teeth, within both the columellar, and basal, lips ; whorls 
numerous, strongly striate-costate ; lip simple. 
S. labyrinthica, Say. 
Helix labyrinthica, Say, Jour. Acad. Phila. “Fos, 45 
Loge 
