Descriptions of New Fluviatile Shells. 121 



Eabitat. — Alabama. 

 My cabinet. 



Obs.—A short shell, almost like an Anculosa ; a single speci- 

 men only is before me, but is too remarkable to be confounded 

 with any known species. 



The uncommonly broad, dark band, surrounded by the 

 generally yellow epidermis, gives it a lively appearance. 



41. IVIelania plena. 



Plate III. Fig. 21. 



T. oblongo-ovata, glabra, crassa, fusco-virescente ; spira parum ele- 

 vata, decollata ; anfr. 4-5, convexis, ultimo magno, in medio subcon- 

 stricto, fasciis duabus obscuris ; suturis irregulariter valde impressis ; 

 apertura magna, subrhomboidea, intus livida et fasciata ; columella recta, 

 torta, foveata, in sinum profundum angustum producta. 



Shell oblong ovate, smooth, thick, dark olive-green ; spire 

 abruptly decollate, not elevated; whorls 4-5, convex; body 

 whorl large, a little constricted in the centre, having two very 

 faint, distant bands, more distinct in the interior ; sutures irre- 

 gularly and distinctly impressed; aperture large, sub-rhom- 

 boidal, within livid and banded; columella strongly indented 

 and twisted, with a strong sinus at base. 



Length 0.80 inch (21 millim.). Diam. 0.45 inch (11 millim.). 



Length of aperture 0.42 inch (11 millim.). 



Breadth of do. 0.20 inch (5 millim.). 



Habitat — Alabama. 

 My cabinet. 



Obs.—A strong, corpulent shell, of a dark, livid color, which 

 cannot well be confounded with any other ; its most prominent 

 characters are, its full broad form, the paucity of its whorls, 

 and its strongly indented columella. 



