NEW MELANIDiE OF THE UNITED STATES. 281 



Trypanostoma Tennesseense. PL 36, fig. 100. 



Testa lsevi, obtuse conica, valde inflata, subcrassa, tenebroso-fusca ; spira brevi, valde obtusa; suturis 

 impressis ; anfractibus instar senis, convexis ; apertura magna, subrhoniboidea, intus tenebrosa ; 

 labro acuto, expanso, infleeto et valde sinuoso; columella inferne valde incrassata et eontorta. 



Shell smooth, obtusely conical, very much inllated, rather thick, dark brown ; spire 

 short and very obtuse ; sutures impressed ; whorls about six, convex ; aperture large, 

 subrhomboidal, dark within ; outer lip acute, much expanded below, inflected and 

 very sinuous ; columella very much thickened below and twisted. 

 Proc. Acad. Nat. Sci., 1862, p. 175. 



Bab. — Tennessee, Drs. Troost and Currey; Lebanon County, Tennessee, J. M. Safford. 



My cabinet and cabinets of Drs. Troost and Currey and Mr, Safford. 

 Diam. ;47, Length -84 inch. 



Remarks. — I have four specimens of this species. The two largest have been in 

 my possession for a long time. They are from Dr. Troost, and are more inflated. 

 While the older part is dark brown, the newer part is dark green, and the interior 

 partakes of these colors. The specimen from Mr. Safford is rather smaller and browner, is 

 purplish within and is thickened on the outer lip near the base. All have a light line 

 under the suture. That from Dr. Currey is about half grown, and has two broad 

 bands. The largest specimen is figured, the lower part of the specimen is moi-e ex- 

 panded than the others, and is very remarkable in this respect. In outline it is 

 allied to M. pinguis (nobis), but differs much in the form of the aperture. The aper- 

 ture is nearly half the length of the shell. 



Trypanostoma Knoxense. PI. 36, fig. 101. 



Testa laevi, conica, vel ferruginea, vel vittata, subcrassa ; spira subelevata, rcucronata ; suturis im- 

 pressis ; anfractibus octonis, convexiusculis, superne carinatis; apertura parva, intus vel albida vel 

 fusca ; labro acuto, sinuoso, expanso ; columella parum incrassata et eontorta. 

 Shell smooth, conical, ferruginous or banded, rather thick, spire rather attenuate, 

 pointed ; sutures impressed ; whorls eight, slightly convex, carinate above ; aperture 

 small, white or brown within ; outer lip sharp, sinuous, expanded ; columella slightly 

 thickened and twisted. 



Proc. Acad. Nat. Sci., 18G2, p. 175. 



Hah. — Flat Creek, Knox County, Tennessee, Prof. D. Christy. 



My cabinet and cabinet of J. Clark. 

 Diam. -31, Length -76 inch. 



BemarJcs. — About a dozen of this little species were sent to me some 3-ears since by 

 my deceased friend Joseph Clark. They were collected by Prof. Christy. There is 

 great variety in the color of these specimens. Some are entirely ferruginous, others have 

 a single light line under the sutures, others again have two well defined rather broad 



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