Descriptions of New Fluviatile Shells. 101 



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. JVfelania textilosa. 



Plate II. Fig. 20. 



T. conica, crassa, strarninea ; spira pariim 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 

 striate on its upper half; sutures impressed ; aperture rather 

 large, ovate, whitish, inclining to roseate. 



Length 0.88 inch (23 millim.). Diam. 0.40 inch (10 millim.). 



Length of aperture 0.39 inch (10 millim.). 



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



Habitat. — Georgia . 

 My cabinet. 



' APRIL, 1854. 8 Ann - Lyc> NA ' ^ • Hist., Vol. VI. 1 



