160 LAND AND FUESH-WATER SHELLS OF N. A. [PART IV. 



of which seems to have been lost by truucation ; obtusely sliouldered 

 and shelving, with about ten, short, thick, elevated, rather distant, lon- 

 gitudinal ribs on each which, on the body-whorl, are nearly obsolete, 



rarely extending below the shoulder; sutures distinctly im- 

 Fig. 30G. ^ 



pressed, 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 tliickened by a calcareous deposit 



along its whole length, more prominent near the upper angle 



of the aperture. 



Habitat. —Tennessee. 



Diameter, -22 of an inch (5^ millim.) ; length, -50 of an inch (13 



millim.)- Length of aperture, •24 of an inch (6 millim.) ; breadth of 



aperture, -13 of an inch (3 millim.). 



Observations. — I know no species with which the present one can 



easily be confounded ; its short, rather broad outline, with its thick, 



prominent, longitudinal ribs on the short whorls of the spire, will 



readily distinguish it. Six specimens only are before me, three of 



which are banded, and three are plain ; the specimens are otherwise 



very uniform in appearance. — Anthony. 



The figure is from Mr. Anthony's original tj-pe. Other spec- 

 imens exhibit sliglit folds on the body-whorl. 



An examination of the types of coronilla, elegantula and 

 abbreviata, together with other specimens, convinces me that 

 they are all varieties of one species, which does not always 

 develop the folds on the spire. It is a very remarkable species 

 in the form of the shell, tubercles and aperture, and partic- 

 ularly in the broad band of a lighter color tlian the general 

 hue of the shell. 



The following is the description of 



Melania elegantula. — Shell obtusely conical, smooth; whorls 5-6, 

 irregularly shouldered and angulated ; body- whorl dark yi^. 307. 

 olive-green color, with two or three darker bands, which 

 are visible also within the aperture ; upper whorls of a very 

 light green color, with one light brown sub-central band, 

 and another so near the upper part of the whorl as to be 

 almost concealed by the suture ; sutures rather obscure ; 

 aperture rather large, irregularly ovate ; columella much indented near 

 its base, outer lip sinuous. 



Habitat. — Kentucky. 



