158 



LAND AND FRESH-WATER SHELLS OF N. A. [PART I. 



blunt ; anterior surface with vertical ribs ; concave margin 

 minutely notched. 



Lingual membrane with 75 rows of 11 — 1 — 11 teeth each; 



Fig. 272. 



Lingual dentition of Helix puldiella. [Morse.] 



centrals very small, broad, obtuse, tricuspid ; laterals long, bi- 

 cuspid ; uncini short, broad, serrated. 



SuBGEXus FRUTICICOLA, Held. 



Shell urabilicated or perforated ; depressed-globose, sometimes 

 pilose ; whirls 5-7, rather convex ; aperture broadly lunate or 

 lunate-rounded, peristome acute, very briefly expanded, labiate 

 within, its basal margin reflexed. 



Fig. 273. 



Helix llispida, Linn. — Shell openly nmbilicated, suborbicnlately- 

 depressed, lioin-color, shining, with short hairs ; spire convex ; 

 whirls five to six, rather convex, narrow ; aperture broadly 

 lunate ; peristome spreading, thickened witli white within, 

 its basal terminus more narrow, prominent, and acute. 

 Greater diam. 10, lesser 9 ; height 5^ mill. 



Helix hispida, LtxnjEcs, Syst. 675, &c. &c. — Pfeiffer, Mon. 



Hel. Viv. I, 148. 

 Hijgromia hispida, Tryon, Am. Journ. Conch. II, 308, pi. v, 



f. 2 (1866). 



This is an European species, which has been found 

 at Halifax, N. S.. probably accidentally introduced from England. 



