CONCHOLOGIA CESTRICA. 



37 



Sub-genus ZONITES, MONTFORT, 1810. 



JLnimal of Zonites fuliffinosus. [B. & B.] 



Fig, 43. 



Shell orbiculate, convex, or discoidal ; whorls 6-7, 

 gradually increasing, striated above, smooth beneath ; 

 aperture lunate, oblique ; peristome acute, and slightly 

 thickened, within. 



Z. fuliginosus. 



[B. & B.] 



Fig, 44, 



Z. fuliginosus, GRIFFITH. 



Helix fuliginosa, Griff, (in litt), 

 C. B. Adams' Amer. Jour. Science, 

 Vol. 40, p. 273. 



Shell rather large, thin, chestnut- 

 brown, orbicular, depressed ; whorls 

 4^, increasing rapidly; aperture lu- 

 nate-ovate, very oblique ; lip thin, 

 acute, slightly thickened within, by a 

 testaceous deposit; extremities of the 

 peristome approximate ; umbilicus 

 moderate, deep ; lingual membrane 

 very broad, with 87 rows, of 64-1-64, 

 teeth ; buccal plate arcuate, margin 

 simple, with a blunt, median projec- 

 tion. H. 13, W. 25, mill. 



Station, in woods. Lancaster County, Pennsylvania 



Jaw of Z. fuliginosus. 



[B. & B.] 



Fig, 45, 



Lingual Dentition of Z. fuliginosus. [B. & B.] 



Fig, 46, 



