CONCHOLOGIA CESTRICA. 



H. cellaria, MULL. 



Helix cellaria, Mull., Hist. Verm., II., 1773. 



H. cellaria. [B. & B.j 



Fig, 56, 



Jaiv of H. cellaria, young and old. 



[Morse.] 

 Fig, 57, 



Shell depressed, polished, light greenish above, pale 

 beneath; whorls 5, flattened; aperture oblique, sub- 

 circular; umbilicus small; lip thickened within, and sub- 

 reflected near its base ; lingual membrane with 38 curving 



XAngual Dentition of IT. cellaria. [Morse.] 

 Fig, 58, 



rows of 17-1-17 teeth, each; buccal plate strongly 

 arcuate, with a median projection. H. 7, W. 13, mill. 



Station, in cellars and gardens, in and near maritime 

 cities. Chester County ; Philadelphia. 



OBS. Introduced from England. 



H. indentata, SAY. 



Helix indentata, Say, Jour. Acad. Phila. F. S., II., 1822. 



Shell small, thin, depressed, pellucid, H. 

 pale, highly polished ; whorls 4, rapidly 

 enlarging, with distant radiating, impressed, 

 lines, which extend to the indented centre 

 of the imperforate base ; aperture expanded ; 

 peristome thin, acute, reaching to the basal 

 centre. H. 2j, W. 5, mill. 



[B. & B.I 

 Fig, 59, 



