208 LAND AND FRESH-WATER SHELLS OF N. A. [PART IV. 



both of which, however, disappear towards the lower portion of each 



whorl, and are hardly visible on the last whorl ; sutures deeply ira- 



^. „ ^. ,,, pressed : aperture small, ovate, within translucent. 

 Fig. 410. Fig. 411. ^ ^ ^ ' 



exhibiting the exterior coloring through its sub- 

 stance ; columella but little rounded, except near 

 its base, where with the much curved lip it forms 

 a sharp, narrow sinus. 



Diameter, -24 of an inch (6 millim.) ; length, -80 

 of an inch (21 millim.). Length of aperture, -20 

 of an inch (7 millim.) ; breadth of aperture, -15 of an inch (4 millim.). 

 Habitat. — Kentucky, near Owenborough. 



Observations. — This is a very slender and elevated species, resem- 

 bling in this respect M. comma, Con., from which it differs very 

 materially by the character of its folds and striae, which are more 

 decided, being nearly as prominent, though less distant than in 

 M. ciirrcyana. Lea ; the strias revolve round the whorls and over the 

 ribs without being interrupted by them ; differs from M. Edgariana, 

 Lea, by its brown color, moi'e slender form, less convex whorls, and 

 thinner texture ; it is more slender than M. decora or costulata, and 

 less acute, the whorls tapering more gradually to the apex; on the 

 upper whorls there are about five stride, the lowest of which is much 

 more elevated than the others, and the folds are ari-ested by it near 

 the suture. The penultimate whorl is often subangulated at its 

 base. — Anthony. 



93, G. teres, Lea, 



Melania teres, Lea, Philos. Proc, ii, p. 13, Feb., 1841. Philos. Trans., viii, p. 176- 

 t. 5, f. 27. Obs., iii, p. 14. DeKay, Moll., New York, p. 9(i. Tkoost, Cat. 

 Slielli^, Tenn. Wheatley. Cat. Shells. U. S.. p. 27. Binney. Check List. No. 

 2(i9. Jay, Cat. 4th edit., p. 275. Catlow, Conch. Nomenc, p. 189. Brot, 

 List, p. o.'j. 



Melania terebralis. Lea, Philos, Proc, ii, p. 13, Feb., 1841. Philos. Trans., viii, 

 p. 178, t. G, f. 32. Obs., iii, p. IG. DeKay, Moll., New York, p. 9G. TiioosT, 

 C.it. Shells, Tenn. Wheatlev, Cat. Sliells, U. S., p. 27. Binney, Check List, 

 No. 268. Catlow, Conch. Nomenc, p. 189. Buox, List, p. 3G. 



Description. — Shell folded, acutely turreted, thin, horn-colored; 

 spire drawn out ; sutures impressed ; whorls nine, convex ; aperture 

 small, elliptical, whitish within. 



Habitat. — Tennessee. 



Diameter, -25; length, -87 of an inch. 



Observations. — This is a remarkably elevated species, with the 



