84 HELICEA. 



by Say, but I scarcely consider that a good specific character. 

 Fresh specimens of H. fatigiata are, I believe, covered with a very 

 thin epidermis, on which hairs are sparingly scattered, the scars 

 of the hairs may be detected, especially on the last whorl, in denud- 

 ed shells. 



H. fatigiata has, at a short distance within the aperture on the 

 base of the last whorl, a small, detached, erect, rounded tubercle, 

 answering probably the same purpose in the economy of the ani- 

 mal, as the " fulcrum " originally noticed by Mr. Lea (Observa- 

 tions, Vol. V. p. 80) in H. spinosa, though of a different construc- 

 tion. 



I do not think the true fatigiata inhabits Ohio. It seems 

 more properly to belong to the region of Tennessee. 



Pfeiffer's objection to the retention of the name, which 

 is evidently a misprint, can hardly be removed, since the 

 n&iae fastigiaia is already occupied by another species. 



HELIX HAZARDI BLAND. 



PLATE LXXVIII. FIGURE 13. 



Polyyyra plicata SAY, 1. c. ; (Binney's ed.) p. 21. 



Helix fatigiata BINNEY, in Bost. Journ. 1. c. (excl. syn. et fig ) in Terr. Moll. 



(excl. syn. et fig.) 



Helix Texasiana PFEIFFER, 1. c. (excl. syn. et descr.) 

 CHEMNITZ, (excl. syn., descr. et fig.) 



Helix Dorfeuilliana DESHAYES, in Fer. 1. c. (excl. descr., syn. et fig.) 

 Helix Troostiana W. G. BINNEY, Notes, p. 21. 



Helix Hazardi BLAND, N. Y. Lye. vi. 291 ; Notes 16, pi. ix. figs. 17-20. 

 Helicina plicata DEKAY, N. Y. Moll. p. 28. 



There are Kentucky specimens of this shell deposited 

 in the Philadelphia Academy by Say. His description is 

 as follows : 



POLYGYRA PLICATA. Shell convex beneath, depressed above, 

 spire slightly elevated ; whorls five, compressed, crossed by numer- 

 ous raised, equidistant lines, which form grooves between them ; aper- 

 ture subreniform, labrum reflected, regularly arcuated, describing 

 two thirds of a circle ; within two-toothed, teeth not separated by a 

 remarkable sinus ; labrum with a profound duplicature, which ter- 



