Descriptions of New FluviatiU Shells. 



in M. Curryana Lea; the striae revolve round the whorls and 

 over the ribs without being interrupted by them ; differs from 

 M. Edgariana Lea, by its brown color, more 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 striae, the lowest of which is much more elevated than the 

 others, and the folds are arrested by it near the suture. The 

 penultimate whorl is often sub-angulated at its base. 



16. Melania baciilum. 



Plate II. Fig. 16. 



T. elongato-conica, crassa, fulvo-castanea ; spira perelevata, decollata ; 

 anfr. superst. 8, subplanis, plicis trans versis striisque spiralibus decussatis, 

 quae in anfr. inferioribus obsolescunt ; suturis impressis, flavescentibus ; 

 apertura ovata, intus purpurascente ; columella incurva, foveata, in sinum 

 tenuem producta. 



Shell conical, thick; of a dull, reddish-brown color, with a 

 lighter shade near the upper part of each whorl. Spire much 

 elevated, not diminishing rapidly as it ascends, and with nearly 

 a rectilinear outline ; whorls 8 remaining, and with an appear- 

 ance of having lost several by truncation ; hardly convex and 

 with a deeply impressed suture ; aperture small, broadly ovate, 

 light red within; columella rounded, indented, with a small 

 sinus. 



Length 1.28 inch (33 millim.). Diam. 0.48 inch (12 millim.). 



Length of aperture 0.35 inch (9 millim.). 



Breadth of do. 0.20 inch (5 millim.). 



Habitat. Tennessee. 



My cab. Cab. Lye. Nat. Hist., N. Y. B. W. Budd, M.D. 



Obs. The most striking characteristic of this species is its 



