Descriptions of New Fluviatile Shells. 



Obs. A very graceful, rather slender species, with somewhat 

 of a club-shaped form by its bulbous body whorl. Two speci- 

 mens only are before me ; one has a narrow band at the base 

 of the body whorl, the other has an additional band on the 

 penultimate, faintly indicated also on the upper whorls of the 

 spire. 



It may be compared with M. conica Say, but is much more 

 elevated, the whorls are more narrow and crowded, as well as 

 more numerous than in that species, and the aperture mucli 

 smaller, being only about one- fourth the length of the shell. 



From M. neglecta it differs by its more slender form, smaller 

 and more condensed whorls, and by its entirely different aper- 

 ture. The apicial whorls seem to be slightly folded. 



6. Melania latitans. 



i / 



Plate II. Fig. 6. 



T. conica, tenui, fulvo-virente ; spira elevata ; anfr. 8-9, convexis, vel 

 subangulatis, transverse rude striatis, striis spiralibus impressis, inferne 

 obsoletioribus, fasciisque obscuris cinctis ; apertura rotundo-ovata, intus 

 rubescente et purpureo fasciata ; labro sinuoso ; columella incurva, pur- 

 purea, in sinum latum producta. 



Shell conical, obscurely striate, greenish brown, rather thin ; 

 spire elevated ; whorls 8-9, convex or subangulated, with three 

 or four obscure transverse striae above the angle, which become 

 obsolete below it, and one or two brown bands at and above the 

 middle of each turn ; sutures distinct ; lines of growth coarse, 

 amounting almost to ribs on the lower whorls; aperture not 

 large, sub-rotund or very broad ovate, reddish within, and 

 banded ; columella very much curved and twisted, with a small 

 sinus at base. 



Length 1 inch (26 millim.). Diam. 0.39 inch (10 millim.). 



Length of aperture 0.34 inch (9 millim.). 



Breadth of do. 0.21 inch (5 millim.). 



