Descriptions of New Fluviatile Shells. 85 



of whorls, and size and color of aperture. Differs from M. 

 regularis Lea by its less number of whorls, and their convexity, 

 as well as by its peculiar green color. 



3. Melania hastata. 



Plate II. Fig. 3. 



T. conica., glabra, subcras?a, uigro-castanea ; spira elevata ; anfr. 8-9, 

 vix convexis, striis spiralibus exilibus raris cinctis, ultimo vix angulato; 

 linea flava prope basim obscure cincto ; suturis leviter impressis, albo- 

 lineatis; apertura parva, elongato-ovata,, intus purpurea; labro sinuato; 

 columella torta, incurva, purpurea, in sinum latum producta. 



Shell conical, smooth, rather solid, dark chestnut ; spire rather 

 obtusely elevated ; whorls 8-9 in number, slightly convex, with 

 occasional delicate spiral striae, the upper ones subcarinate ; 

 body whorl subcarinate, with a narrow yellowish band beneath 

 the angle; sutures moderately impressed, yellowish; aperture 

 small, pyriform, purple within ; columella and outer lip much 

 twisted together, forming a broad, rather deep, reflexed sinus 

 at base. 



Length 0.90 inch (23 millim.). Diam. 0.30 inch (7| millim.). 



Length of aperture 0.30 inch (7-| millim.). 



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



Habitat. — Alabama. 

 My cabinet. 



Obs. — A fine symmetrical species, which seems to have no 

 affinities so close as to be easily confounded with any other. 

 Its most prominent characters, perhaps, are the nearly uniform 

 diameter of the two or three lower whorls, while above these 

 the spire curves more rapidly to the rather acute apex, and the 

 dark purple aperture. These two points will readily serve to 

 distinguish it. 



MARCH, 1854. 7 Ann. ,Lyc. Nat. Hist., Vol. VI. 



