84 Descriptions of New Fluviatile Shells. . 



Length 1.25 inches (32 millimetres). Diam. 0.40 inch (10 

 millim.). 



Length of aperture 0.40 inch (10 millim.). 

 Breadth of do. 0.23 inch (6 millim.). 



Habitat. — Tennessee. 



My cabinet. Cab. Lye. Nat. Hist., N. Y. B. W. Budd. 



Obs. — A stout species, and one of the most beautiful with 

 which I am acquainted. The ribs are not strongly expressed, 

 and on the lower whorls are nearly obsolete, having there the 

 appearance of stria? of growth merely. Body whorl a little 

 angulated at base. 



2. Melamia viridula. 



Plate II. Fig. 2. 



T. conica, glabra, subcrassa, prasina, ; spira elevata ; anfr. subconvexis ; 

 suturis impressis ; apertura ovata, parva, intus albida; labro sinuato ; 

 columella incurva, in sinurn profundum producta. 



Shell conical, smooth, rather thick; olive green; spire much 

 elevated ; whorls 8-9, slightly convex ; sutures impressed ; 

 aperture elliptical, small, within whitish, outer lip much waved 

 or auger shaped, extending forward at base, and forming a 

 broad sinus in that region. 



Length 1 inch (26 millim.). Diam. 0.35 inch (9 millim.). 



Length of aperture 0.32 inch (8 millim.). 



Breadth of do. 0.16 inch (4 millim.). 



Habitat. — Tennessee. 



My cabinet. Cab. N. Y. Lye. Nat. Hist. B. W. Budd, M. D. 



Obs. — Somewhat like M. Saffordi Lea, but is clearly distin- 

 guishable by its more elongated form, its greater number 



