420 Remarks on Certain Species 



XXXVII. — Bemarhs on Certain Species of North American 



Helicid^. 



By Thomas Bland. 



{Continued from p. 142, and concluded.) 



Eead December 16th, 1861. 



Helix Doivnieana hot. sp. 



Plate IV. fig. 23-24. 



T. snbobtecte umbilicata, subglobosa, tenui, subpellucid^, obsolete 

 costulato-striata, lineis spiralibus impressis sublente confertim decnssata, 

 virenti-cornea ; spira brevi, obtusa ; anfr. 5, convexis, ultimo tiimido, 

 antice gibbosulo, vix descendente, constricto ; apertura obliqua, lunato- 

 ovali ; perist. albo, labiato, reflexo, margine dextro expaiiso, coluraellari, 

 angulatim dilatato umbilicum fere tegente. 



Shell nmbilicate, umbilicus nearly covered, subglobose, thin, 

 subpellucid,with obsolete rib-like striae, decussated with crowded 

 microscopic spiral lines, greenish horn-colored ; spire short, 

 obtuse ; whorls five, convex, the last tumid, anteriorly some- 

 what gibbous, scarcely descending, constricted ; aperture ob- 

 lique, lunate-oval ; perist. white, labiate, reflected, right margin 

 expanded, columellar margin angularly dilated, nearly covering 

 the umbilicus. 



Diam. maj. lOi^, min 9^, Alt. 6 mill. 



Station. — Among leaves, at the roots of grass and shrubs in 

 rocky places. 



Ilahitat. — University Place, Franklin Co., Tenn. Downie ! 



JRemarTcs. — In the autumn of 1860 1 received three specimens, 

 through Bishop Elliott, from Major Downie of Brunswick, Ga., 

 to whom I dedicate the species. In form and aspect it is most 

 like H. Christyi Nob., but has no parietal tooth ; it is allied 

 also to IL clausa Say, and H. Mitchelliana Lea. 



