Descriptions of New Fluviatik Shells. 



subplanis, ultimo subangulato superne glabro, inferne liris quinis exilibus 

 cincto ; suturis impressis ; apertura elongato-ovata, intus albida, sub- 

 margaritacea ; columella subreeta, in sinum modicum producta. 



Shell conical, nearly smooth, thick ; spire obtusely elevated ; 

 whorls 6-7, nearly flat ; sutures well impressed ; upper whorls 

 smooth, or only modified by the lines of growth, which are 

 coarse and distinct; body whorl with five prominent striae 

 below the middle, of which the lower three also revolve within 

 the aperture, on the columella ; aperture small, elliptical, within 

 whitish, subnacreous ; columella not indented, sinus small. 



Length 0.75 inch (19 millim.). Diam. 0.30 inch (8 millim.). 



Length of aperture 0.33 inch (8 millim.). 



Breadth of do. . 0.17 inch (4 millim.). 



Habitat. Alabama. 

 My cabinet. 



Obs. A singularly pale, greenish-white species, the distin- 

 guishing marks of which are, its regular, subcylindric form, and 

 the smooth spire, combined with the prominent striae at the base 

 of the shell. These are characters which I do not recognise on 

 any other species so combined. There is also a distinct carina 

 on the penultimate whorl, near the top of the aperture, above 

 which may be observed a faint interrupted line. 



20. jflelania textilosa, 



Plate IL Fig. 20. 



T. conica, crassa, straminea ; spira parum elevata ; anfr. 7-8, obscure 

 liratis et subnodosis, superioribus subplanis, ultimo subconvexo, infra 

 medium glabro ; suturis impressis ; apertura ovata, roseo-albida ; colu- 

 mella incurva, reflexa, in sinum tenuem producta. 



Shell conical, thick ; color uniform, pale greenish yellow ; 

 spire not acutely elevated ; whorls 7-8, nearly flat, obscurely 

 striate and sub-nodulous ; body whorl coarsely, but not thickly 



