HELIX. 217 



Geographical Distribution. It has hitherto been 

 noticed only in Western Tennessee. 



Remarks. The only species with which this can be 

 compared is E. alternata, with which it nearly agrees in 

 form, color, and sculpture, ^he carinated variety of the 

 latter, especially, has a very close resemblance ; and, 

 although it has the marginal constriction under the 

 carina, it does not appear above, as in R. Cumherland- 

 iana. The shell before us is much more depressed, 

 smoother beneath, much more broadly umbiHcated, and, 

 on account of the very decided peripheral carination, has 

 a much more decidedly lozenge-shaped aperture. — [g.] 



65. HEI^IX STRIATELLA, Anthoitt. 

 Plate XXX. Figure 2. 



H. testa parva, orbiculato-depressa, tenui, late umbilicata, 

 cornea ; anfractibus quatuor convexis, oblique et minute 

 striatis ; apertura transversa, sub-rotundata ; labro tenui, 

 acute. 



SYNONYMS AND KEFEKENCES. 



Hetiz striatella, Anthony, Boston Journ. Nat. Hist. III. 278, pi. 3, f. 2. 

 BiNNEY, Boston Journ III. 432, pi. 21, f. 5. 

 Gould, Invcrtebrata, 178, f. 112. 

 Adajis, Vermont Mollusca, 12. 

 De Kay, New York Report, 43, pi. 3, f. 40. 

 Chemnitz, 2d ed. tab. 85, fig. 36-38. 

 Pfeitfee, Monog. Helic. Viv. I. 104. 



DESCRIPTION. 



Animal. Head, neck, and tentacles, dusky ; foot white. 

 VOL. 11. 55 



