CONCHOLOGIA CESTRICA. 



s. imeata, en. 



lar ff ed.-[B. & B.] 

 Fig, 79, 



H. lineata, SAY. 



Helix lineata, Say, Jour. Acad. Phila. 



p g J j g j 



Shell small, discoid, pale greenish yel- 

 low ; whorls 4, planulate above, concave 

 beneath, with about fifteen revolving 

 lines ; aperture narrow-lunate, two pairs 

 of teeth, within the outer lip; one pair 

 visible, the other deeper; lingual mem- 

 brane with 77 curving rows of 12-1-12 

 teeth, each ; buccal plate narrow, crescentic, anterior 



surface, with converging striae, 



Jaw of H. lineata. [Morse.] 



Fig, 80. cutting margin smooth, with a 



median projection. H. i, W. 

 3, mill. 



Lingual Dentition of H. lineata. [Morse.] 



Fig. 81, 



Station, in cool wet places, under stones. Chester 

 County; frequent. 



Sub-genus PUNCTUM, MORSE, 1864. 



Shell exceedingly minute, discoid, umbilicate; aperture 

 rounded ; peristome thin, acute. 



P. minutissimum, LEA. 



Helix minutissima, Lea, Trans. Arner. Phil. Soct, 

 IX., 1841. 



Shell very minute, depressed-turbinate, above, convex 



