Descriptions of New Fluviatile Shells. 



Habitat. . 



My cabinet. Cab. Lye. Nat. Hist., K Y. 



Obs. A beautiful, slender, graceful species, in form not 

 unlike J/. percarinata Con. and perangulata Con., but differs 

 from both in coloring, in the want of a crenulated or beaded 

 line on the volutions, and in other respects. The upper whorls 

 are often obscurely folded down to the carina on each, where 

 they are arrested ; below the carina the whorls shelve towards 

 the suture, which thus becomes situated in a deep furrow. 

 It cannot be confounded with M. elevata Say, which has flat 

 whorls, a dark epidermis, and a totally different aperture. 

 The columella of the present species is faintly tinged with 

 purple. I am not quite sure as to the habitat of this species? but 

 think it an Ohio shell. 



5. jflelania al tip eta. 



Plate II. Fig. 5, a, b. 



T. conica, glabra, subcrassa, cornea; spira elevata; anfr. 10, con- 

 vexis, superioribus carinatis, vel modo striatis, ultimo 1-2-fasciato ; 

 suturis distincte impressis ; apertura parva, ovata, intus fasciata ; colu- 

 mella incurva, in sinum effusum producta. 



Shell conical, smooth, horn-colored, thick; spire elevated; 

 whorls about 10, small, convex, the upper ones carinate, or 

 only striate ; sutures distinctly impressed ; aperture small, 

 elliptical, banded within; a small but distinct sinus, with an 

 acute termination at base. 



Length 0.62 inch (16 millim.). Diam. 0.24 inch (6 millim.). 



Length of aperture 0.21 inch (5 millim.). 



Breadth of do. 0.10 inch (2J millim.). 



Habitat. Racoon Creek, Vinton county, Ohio. 

 My cabinet. 



