NEW MELANID^ OF THE UNITED STATES. 271 



aperture small, rhomboidal, rather narrow, pale brown within ; outer lip acute, 

 sinuous ; columella thickened below and twisted. 

 Proc. Acad. Nat. Sci., 1862, p. 173. 



Hob.— Alabama ? J. C. Jay, M. D. 



My cabinet and cabinet of Dr. Jay. 

 Diam. - 46, Length 1*16 inch. 



Remarks. — A single specimen was given to me many years since by Dr. Jay under 

 the name of Melania prassinata, Con., but it is a very different shell from the type 

 of that species in the collection of the Academy of Natural Sciences, that being 

 of a greenish color, having a few nodes round the periphery, which is angulated, 

 neither of which characters belong to Jay I. Indeed, our shell is much nearer to clausa 

 (nobis) in outline, but it is not so pupgeform, and it has a more twisted columella, the 

 spire being more conical. 



It is to be regretted that a single specimen only should be under observation, as 

 others may be different in color. The interior as well as the columella are of a dull 

 salmon, and the darkness is occasioned by obscure bands which do not extend quite 

 to the edge, which is slightly thickened. The aperture is not quite one-third the 

 length of the shell. I name this species after Dr. Jay, to whom I owe the possession 

 of it, and who has done so much to advance a knowledge of our conchology. 



Trypanostoma Spillhanii. PI. 36, fig. 82. 



Testa, laevi regulariter conica, tenebroso-oliva ; spira, elevata ; suturis regulariter impressis ; anfractibus 

 instar novenis, planulatis; apertura parviuscula, rhomboidea, intiis albida, interdum vittata; labro 

 acuto, sinuoso ; columella alba ct valde contorta. 



Shell smooth, regularly conical, dark olive ; spire much raised ; sutures regularly 

 impressed ; whorls about nine, flattened ; aperture rather small, rhomboidal, white 

 within, sometimes banded ; outer lip acute, sinuous ; columella white and very much 

 twisted. 



Operculum ovate, reddish brown, rather thin, with the polar point near the 

 base. 



Proc. Acad. Nat. Sci., 1862, p. 173. 



Hob. — Noxubee River, Mississippi, Wm. Spillman, M. D., and Tennessee, J. Clark. 



My cabinet and cabinet of Dr. Spillman. 

 Diam. -46, Length 1*20 inch. 



Remarks. — Six specimens are before me, one of them is slightly carinate. In 

 some there is a disposition to put on a whitish line below the suture. The aperture 

 is about one-third the length of the shell. 



I have great pleasure in naming this species after my friend Dr. Spillman. 



