100 HELICID^E. 



tubercles very distinct and prominent, on the back 

 arranged longitudinally, on the tentacles long and nar- 

 row. Dental edge of the upper jaw saffron color. 

 Extreme length, two inches and a half. 



SHELL convex ; epidermis immaculate, of a uniform 

 yellowish brown, russet, or light chestnut color ; whorls 

 between five and six, with fine parallel striae running 

 obliquely across them, and spirally striated with very 

 minute and delicate, but distinct, wavy, impressed lines, 

 which are most apparent on the back of the reflected 

 lip ; suture well marked and distinct ; aperture con- 

 tracted by the lip ; lip white, flattened in the plane of 

 the mouth, abruptly and very widely reflected ; umbili- 

 cus of the mature shell covered by the reflected lip, 

 which is continued to the base of the shell. 



Greatest transverse diameter one inch and a half, 

 ordinary size about one inch. 



GEOGRAPHICAL DISTRIBUTION. This species has been 

 noticed on the banks of the Missouri as high as Coun- 

 cil Bluffs, and in the North-western Territory. It is 

 found in all the States from Canada to South Carolina, 

 in Tennessee and in Arkansas, and may be supposed to 

 inhabit the whole extent of the United States except the 

 most southern part, where it appears to be replaced by 

 Helix major. It is more frequent in well wooded than 

 in cleared sections, and is particularly abundant in the 

 Middle and Western States, in tracts based on the lime- 

 stone formation. 



