126 Descriptions of New Fluviatile Shells., 



Habitat. — Indiana. 



My cab. Cab. Lye. Nat. Hist., K Y. B. W. Budd, M.D. 



Obs. — Allied to, but perfectly distinct from M. undosa ; its 

 greater solidity, more elongated spire, and greater number of 

 whorls will at once distinguish it ; the whorls of the spire are 

 much more convex, and there is no prominent angle formed 

 by the shoulder on the body whorl as in M. undosa. 



47. Melania coronilla. 



Plate III. Fig. 27. 



T. ovata, subcrassa, fusco-cornea ; spira brevi ; anfr. 5-6, convexis, 

 prope humerum irregulariter nodoso-plicatis, ssepe fusco-unicinctis ; 

 suturis valde impressis ; apertura ovata, intus rubescente et fasciata ; 

 columella incurva, foveata, in sinum tenuem producta. 



Shell ovate, moderately thick ; of a dark, dull, horn color, 

 sometimes decorated with two or three linear revolving bands 

 at, and below, the upper part of the aperture ; spire short, with 

 a rather convex outline to the truncated apex ; whorls 5-6, 

 convex, one of which seems to have been lost by truncation ; 

 obtusely shouldered and shelving, with about ten short, thick, 

 elevated, rather distant, longitudinal ribs on each, which on 

 the body whorl are nearly obsolete, rarely extending below the 

 shoulder ; sutures distinctly impressed, but rendered irregular 

 by the interruptions of the longitudinal folds ; aperture not 

 large, ovate, reddish or banded within ; columella much curved, 

 with an indentation below the middle, and thickened by a cal- 

 careous deposit along its whole length, more prominent near 

 the upper angle of the aperture. 



Length 0.50 inch (13 millim.). Diam. 0.22 inch (54 millim.). 



Length of aperture 0.24 inch (6 millim.). 



Breadth of do. 0.13 inch (3 millim.). 



Habitat. — Tennessee. 



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



