HELIX. 907 



outer whorl with a narrow, light-colored band, and 

 an ill-defined, brownish band below it ; aperture round- 

 ed, a little transverse ; lip thin, somewhat thickened 

 within by a deposition of testaceous matter, slightly 

 reflected at its junction with the base of the shell ; um- 

 bilicus small, sometimes nearly obsolete ; base whiter 

 than the upper surface. 



Greatest transverse diameter about three-fourths of an 

 inch. 



GEOGRAPHICAL DISTRIBUTION. It inhabits North 

 Carolina. I have seen numerous specimens from Cabar- 

 rus County. It is also found in Ohio, Pennsylvania, and 

 Maryland. 



REMARKS. This shell resembles some varieties of H. 

 lif/era so nearly, that I hesitated some time before I con- 

 sidered it distinct. The spire is less high in a shell of 

 the same size, has a smaller number of whorls, and is 

 more pyramidal in shape than in that species. The 

 diameter, in full-grown specimens, is greater, and the 

 base is flatter. The epidermis is darker and less shin- 

 ing, the shell is thicker and less pellucid, the deposit of 

 testaceous matter within the aperture is less. The size 

 of the umbilicus and the shape of the aperture are the 

 same in both. But the principal distinction consists in 

 the spiral lines which revolve on the whorl, intersecting 

 the striae of growth, but so minute as hardly to be per- 

 ceptible to the naked eye, yet present in every specimen 

 which I have examined. The whitish, narrow band, 



