184 ZON1TES. 



ish corneous ; whorls 5, convex, lightly wrinkled, rapidly increas- 

 ing, the last very large and ventricose, aperture subciKcular. 



Diam. 26 mill. 



Indiana and Illinois, South westward to Tej.as. 

 It is H. lucubrata, Pfr., not Say. 



H. LUCUBRATA, Say. PI. 55, figs. 31-33. 



Narrowly umbilicated, globosely depressed, lightly, somewhat 

 rugosely striate, polished, brownish yellow, lighter on the base, 

 suture moderately impressed ; whorls 4, aperture suborbicular. 



Diam. 1 inch. Mexico. 



I figure. also a variety from Crosse and Fischer's work (figs. 

 32, 33). 



H. LJEVIGATA, Pfr. PI. 55, figs. 34, 35. 



Narrowly umbilicated, light olivaceous or brownish horn- 

 color, shining, thin, suture moderately impressed ; whorls 5, 

 slopingly flattened, with beautiful regular oblique strite, and 

 microscopic revolving lines, last whorl expanding towards the 

 aperture ; aperture transverse, broadly lunar. Diam. 18-22 mill. 

 Western Pennsylvania to Illinois and Arkansas ; 



Southwards to Florida and So. Alabama: 



It is H. lucubrata, A. Binney, not Say, //. fuliginosa, A. 

 Binney in part, H. inornata, Reeve, not Say. 



' H. RUGELI, W. G. Binney. PL 55, figs. 3f>, 37. 



Perforate, thin, delicately wriiikh'd-striati 1 . more conspicuously 

 rva^ so at the moderate suture, base smoother, whole surface pol- 

 ished, smoky or greenish horn-colored above, often somewhat 

 lighter below; whorls 6, slightly rounded, regularly increasing, 

 the last a little dilated at the aperture, aperture large, rounded, 

 oblique. Diam. 19 mill. 



Roan Mt., N. Carolina. 

 II. INORNATA, Say. PI. 55, figs. 38-40. 



Narrowly perforate, smooth, shining, very minutely striulate, 

 v suture not much impressed ; whorls 5, aperture transverse, 

 obliquely lunar, with a white, testaceous deposit around its whole 

 inner surface, a little distant from the margin, base rather flat- 

 tened, indented in the centre. Diam. 1(1 mill. 



W. New England States, W. Penna. to Illinois, southwards 

 to Tennessee and Western North Carolina and Georgia. 



