HELIX. 255 



SHELL very much flattened above, a little convex; 

 epidermis corneous, shining ; whorls seven, narrow, very 

 slowly increasing in diameter from the apex to the aper- 

 ture, and not expanding at the aperture, with minute, 

 transverse string and wrinkles ; suture moderately im- 

 pressed ; lip thin, acute ; aperture nearly circular, 

 within, upon the base, are two prominent, white, testa- 

 ceous laminee, nearly parallel, and extending far into the 

 cavity of the whorl ; umbilicus large, rather expanded, 

 and deep ; base smooth, well rounded from the umbilicus 

 to the circumference. 



Greatest transverse diameter one-fourth of an inch. 



GEOGRAPHICAL DISTRIBUTION. It inhabits the north- 

 ern parts of Alabama, and the eastern part of Tennessee, 

 in the mountains. 



REMARKS. I do not think it can be said to resemble 

 any other native species. If the umbilicus were closed, 

 it would be not unlike a very depressed form of Helix 

 gularis ; but the umbilicus is large for the size of the 

 shell, and deep. It is a very pretty species. 



