15 



Jour. Acad, vol ii. p. 150, anno, Janunry, 1821. 



Helix moltilineata. — Shell thin, convex, imperforated ; of a 

 brown color, with numerous dark red, revolving lines, which are 

 minutely and irregularly undulated ; whorls six, with elevated, 

 subequidistant lines, forming grooves between them ; aperture 

 lunated, not angulated at the base of the column, but obtusely 

 curved; labrum contracting the mouth slightly, reflected, 

 white, more or less distinctly stained by the termination of the 

 spiral red lines, and adpressed to the body whorl ©ear the base ; 

 umbilicus covered with a white callus. 



Inhabits Illinois and Missouri. Length of the columella about 

 three-fifths, greatest width rather more than one inch- 

 Animal granulated, granulce large, whitish, interstices blackish • 

 foot, beneath, black. 



An exceedingly numerous species iu the moist forests on the 

 margin of Mississippi near the Ohio, and the Missouri as far as 

 Council Bluff. The red revolving lines are numerous, varying 

 from four or five to twenty-five or thirty and perhaps still more ; 

 they are sometime confluent into bands ; when viewed within the 

 mouth they appear sanguineous. 



H. APPRESSA. — Shell depressed, brownish horn color ; whorls 

 five, depressed, forming an angle on the external one, more acute 

 near the superior angle of the labrum, with numerous transverse, 

 elevated, equidistant lines, with interstitial grooves ; umbilicus 

 covered over with calcareous matter, but concave within ; aperture 

 moderate ; labrum dilated, reflected, white, margined with brownish ; 

 near the base, appressed to the body whorl, and covering the um- 

 bilicus ; a slight projecting, dentiform angle on the inner middle ; 

 labrum with a strong, prominent, oblique, compressed, white tooth, 

 which gradually slopes and becomes obsolete towards the um- 

 bilicus. 



Var. a. — Labrum with two projecting angles. Breadth three- 

 fifths of an inch. 



Animal — foot pale ; neck above and each side blackish. In- 

 habits the banks of the Missouri and Ohio. 



This species is very common on the banks of the Ohio below 

 Galiopolis ; I also found it near Council Bluff. It very much re- 

 sembles H. tridentata, but the umbilicus is covered over ; the 

 outer lip at base is flattened upon the shell ; and there is but a 



