NEW MELANIDiE OF THE UNITED STATES. 291 



Shell sulcate, subcylindrical, solid, single-banded, liorn-color ; spire obtusely conical ; 

 sutures impressed; whorls about nine, impressed canaliculate; aperture rather small, 

 rhombic, white within, with a single band ; outer lip acute, very sinuous ; columella 

 thickened below and very much twisted. 



Proc. Acad. Nat. Sci., 1862, p. 172. 



Ilab. — Oostenaula River, near Rome, Georgia, Rev. G. White ; Tennessee River, Dr. 

 Spillman ; Tuscumbia, Alabama, B. Pybas. 



My cabinet and cabinets of Mr. White, Dr. Spillman, Mr. Pybas and Dr. Hartman. 

 Diam. -52, Length LOS inch. 



Remarks. — This is a well characterized species. I have nearly forty specimens from 

 different habitats before me. It is nearly allied to Melania [Trypanoslama) infrafas- 

 ciata, Anthony, but it differs in being more solid and being subcylindrical as well as 

 having a more contracted aperture. It has very much the same kind of fine line 

 near the base. It is not quite so angular. The aperture is not quite one-third the 

 length of the shell. It belongs to the group of which Melania {Trypanostoma) canali- 

 culata, Say, may be considered the type. 



Trypanosoma virtue. PI. 36, fig. 119. 



Testa subsulcata, subcrassa, subfusiformi, olivacea ; spira obtuse conica ; suturis valde impressis; an- 

 liactibus septenis, convexis, ultimo subcanaliculato ; apertura subgrandi, rhomboidea, intiis vel pur- 

 purea vel albida; labro acuto, sinuoso ; columella inferno incrassata et parum contorts,. 



Shell subsulcate, somewhat thick, subfusiform, olivaceous ; spire obtusely conical ; 

 sutures much impressed ; whorls seven, convex, the last slightly canaliculate ; aper- 

 ture rather large, rhomboidal, purple or whitish within; outer lip acute, sinuous; 

 columella thickened below and slightly twisted. 

 Proc. Acad. Nat. Sci., 1862, p. 172. 



Hub. — Tennessee, Prof. Troost. 



My cabinet and cabinet of Dr. Hartman. 

 Diam. -18, Length -89 inch. 



Remarks. — I have about a dozen specimens before me, all of which have the same olive- 

 green hue. They have been in my possession a long time, and I had put them among the 

 young of Melania (Trypanosoma) canaliculata, Say. I have now no doubt but that 

 they are distinct from that large species. None of them are half the size, the color 

 is darker and they are wider in proportion. The revolving furrow above the peri- 

 phery of the last whorl is hardly observable in some specimens. Every one of my 

 specimens has a purplish brown spot at the base of the columella, and in some speci- 

 mens this color pervades the whole of the interior. The aperture is more than a third 

 of the length of the shell. 



