HELIX. 131 



lunate, the extremities of the margins connected by a V-shaped 

 tooth, upper lip tooth compressed, transverse, remote, lower lip-tooth 

 compressed, marginal, both marked externally by pits. 



Diam. 8 mill. 



Tennessee. 



It is H. fatigiata, Say, H. fastigiata, DeKay. 



H. TROOSTIANA, Lea. PI. 27, figs. 66-68; PI. 28, fig. 88. 



Differs from H. fastigans by its less prominent carina, the rib-like 

 striae being well-developed on the base, and its parietal tooth more 

 quadrangular; spire slightly, convexly elevated; corneous, when 

 fresh, minutely hirsute. Diam. 6 mill. 



Tennessee^ 



Is H. plicata, Binney (not Say) in part. 



H. HAZARDI, Bland. PI. 27, figs. 69-71. 



Depressed above, convex below; whorls 5, narrow, ribbed above 

 and below, periphery not angular; aperture subreniform lip- 

 extremities connected by a V-shaped parietal tooth, lip teeth deep- 

 seated, the loAver one the largest and partly obscuring the upper 

 one, which is situated farther in; externally scrobiculate opposite 

 these teeth ; epidermis brown, sparingly hirsute. Diam. 7 mill. 



Kentucky, Tennessee, Georgia, Alabama. 



For H. plieata, Say, preoccupied. 



H. LEPORINA, Gould. PI. 27, figs. 72-74. 



Shell small, lenticular, slightly hairy, minutely striate, spire 

 convex, depressed; whorls 5, somewhat convex, the last subangulate 

 at the periphery, base convex, umbilicus nearly covered, its region 

 excavated; aperture lunate, lip incumbent, reflexed, with a central 

 sinus, the sides of which are formed by two teeth, parietal tooth 

 V-shaped ; chestnut colored, lip sometimes roseate. Diam. 5 mill. 

 Georgia to Tennessee, Indiana, Illinois, Arkansas, Mississippi* 



H. PUSTULA, Fer. PI. 27, fig. 75. 



Small, depressed, lightly striate; whorls 4, subangulate on the 

 periphery, more convex below it, deflected at the aperture ; aperture 

 with a V-shaped parietal tooth, and two tubercular teeth margining 

 a central notch ; umbilicus small and deep, with a groove revolving 

 within it, corresponding with a lamina on the basal part of the 

 interior of the shell ; reddish brown, with short hairs. 



Diam. 5 mill. 



Texas, Georgia, Florida. 



