Descriptions of New Fluviatile Shells. 



fuscis, duabus ornato ; suturis impressis ; apertura ovata, intus bifasciata ; 

 columella valde incurva, sinum vix formante. 



Shell conical, smooth, rather thick, yellowish-brown ; spire 

 short; whorls 6, upper ones subconvex, with a brown band 

 immediately above the suture, body whorl a little shouldered 

 beneath the suture, and angulated in the middle, surrounded 

 by two narrow bands, one above and the other below the angle ; 

 sutures impressed : aperture ovate, banded within, columella 

 much curved, with hardly a perceptible sinus at base. 



Length 0.45 inch (11 millim.). Diam. 0.21 inch (5 millim.). 



Length of aperture 0.20 inch (5 millirn.). 



Breadth of do. 0.12 inch (3 millim.). 



Habitat. Alabama. 

 My cabinet. 



Obs. A small, not inelegant species, which may be compared 

 with M. ovoidea Lea and J/. depygis Say, as its nearest con- 

 geners. The former species I have never seen, but judging 

 from the description this differs from it in many particulars ; its 

 form is proportionately broader, the bands are 'more distinct, 

 the body whorl has a distinct angle, which is also apparent on 

 the penultimate whorl, amounting there to a carination. The 

 aperture is also much smaller. The same particulars apply 

 with equal force to Melania depygis Say, the two being so 

 nearly alike in description that the M. ovoidea may prove to be 

 only a variety of Mr. Say's depygis. 



35. Ulelania pallidula. 



Plate III. Fig. 15. 



T. ovato-conica, glabra, subcrassa, straminea ; spira obtuse elevata, 

 decollata ; anfr. superstit. 4, superioribus subplanis, ultimo angulato, 

 obscure fusco-bilineato ; suturis impressis ; apertura ovata, intus albida, 

 bilineata ; columella incurva, sinum vix formante. 



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