NEW FRESH WATER AND LAND SHELLS. 187 



these two individuals. The aperture is about half the length of the shell. 

 One specimen is dark purple within the aperture. — The other is bluish, with 

 a tinge of purple on the columella. 



Melania circincta. Plate 6, Fig. 51. 



Testa supern^ striata, turritd, suhtenui, fallido-lutea, fasciata; spird exsertd; suturis parvis; an- 

 fractibus novenis, suhconvexis, in medio carinatis; aperturd subparvd, ellipticd, ad basim angulatd,' 

 intus alba. 



Shell striate above, turrited, rather thin, pale yellow, banded ; spire drawn out; sutures small; whorls 

 nine, slightly convex, carinate in the middle ; aperture rather small, elliptical, angular at the base, and 

 white within. 



Hab. Tenn. Dr. Troost. 



My Cabinet, and Cabinet of Dr. Troost. 

 Diam. .35, Length .90 of an inch. 



Remarks. — This beautiful species is peculiar for its pale yellow ground and 

 broad band, which is placed immediately upon the carina. A very indistinct 

 band may be observed below the carina, where in some individuals may also 

 be observed a few striae. In some, the striae on the superior part of the shell 

 are accompanied by indistinct ribs. 



Section VI. — Tuberculate Melanijs. 

 Melania ventJsta. Plate 6, Fig. 52. 



Testa superne subtuberculatd,fusiformi, subtenui,luteold; spird subobtusd; suturis rugoso-impressis ; 

 anfractibus senis, convexis; aperturd productd, ad basim angulatd et canaliculatd, intus albidd. 



Shell disposed to be tuberculate, fusiform, somewhat thin, yellowish above; spire rather obtuse; sutures 

 roughly impressed; whorls six, convex; aperture elongated, at the base angulated and channelled, within 

 whitish. 



Hab. Tenn. Dr. Troost. 



My Cabinet, and Cabinet of Dr. Troost. 

 Diam. .43, Length .80 of an inch. 



VIII. — 2 X 



