336 PROCEEDINGS OP THE ACADEMY OF 



distinguished as var. cusjridata. If, however, they should finally 

 be considered distinct, the name may be retained as characterizing 

 the species. 

 Vitrina latissima, Lewis, Plate 23, fig. 7. 



Shell very much depressed, thin, fragile, translucent, polished; 

 whorls three, very rapidly expanded, with the incrimental lines 

 quite conspicuous and crossed by a few microscopic, impressed, 

 revolving lines ; aperture nearly equal to half the area of the base 

 of the shell, very oblique, unsymmetrically-ovate ; peristome thin 

 and acute, the columellar origin arising from the axis of the shell ; 

 axis imperforate ; color of the shell amber-brown. 



Transverse diameter 0.68 inches = 17.3 mm. Shorter diameter 

 .47 inches = 11.9 mm. Elevation .27 inches = 7.1 mm. 



Tusquita Bald Mountain, at an elevation of 6600 feet. Miss A. 

 E. Law. 



A single specimen of this interesting species is all that is at 

 present known. It is remarkable for the entire absence of eleva- 

 tion of the apical whorl above the surrounding whorls, and for its 

 generally depressed and laterally expanded form. The color of 

 the shell is very like that usually exhibited by translucent speci- 

 mens of Helix [Triodopsis] palliata. The form of the shell forcibly 

 reminds one of the marine shells usually designated Sigaretus per- 

 spectivus. It will probably be found on several of the mountain 

 peaks of east Tennessee at high elevations. 



Melantho obesus, Lewis, MSS., Plate 23, figs. 5, 6. 



W. G. Binney, in " Land and Fresh-water Shells of North 

 America," Smithsonian Miscellaneous Collections, No. 144, page 

 47, fig. 95. No description. 



Shell ventricose and disposed to be gibbous ; whorls, 6 to 7, 

 rounded, the last dilated ; suture well defined and deeply im- 

 pressed ; apex only moderately elevated ; epidermis smooth and 

 olivaceous ; lines indicating well-defined periods of growth strongly 

 marked and black ; surface of the shell traversed with numerous 

 impressed revolving lines ; in some localities the revolving lines 

 are mingled with narrow, interrupted, rufous tracings that impart 

 a ferruginous tint to the epidermis ; opercle ovate gibbous; sub- 

 stance of the shell only moderately thick, with a tendency in 

 favorable localities to form callosities on the parietal portion of 

 the posterior angle of the aperture ; aperture ample and tends to 

 assume a subquadrate form. 



