138 NEW UNIONID^, MELANID^, ETC., 



angular in the middle ; aperture rather large, ovatelj rhomboidal, whitish within ; 

 outer lip acute, nearly straight; columella somewhat thick and a little twisted. 



Operculum ovate, rather thick, dark brown, with the polar point near the base. 

 Proc. Acad. Nat. Sci. 1864, p. 112. 



Sab. — North Georgia and East Tennessee, Bishop Elliott. 



My cabinet and cabinet of Smithsonian Institution. 

 Diam. -36, Length -80 inch. 



Remarks. — A number of specimens of different ages were sent to me from the 

 Smithsonian Institute, and I name it after the founder of that noble institution. In 

 outline it is near to Melania ( Goniohasis) oUusa (nobis), but it is a larger, thicker and 

 more carinate species, and in the folds it differs very^rauch. It is also closely allied 

 in outline and in the apex to Melania (Goniobasis) Warderiana (nobis), but that is a 

 carinate species, and the apex rather more acuminate. The largest specimens 

 remind one of Lecontiana (nobis), but the folds of Lecontiana are larger and it is also 

 more fusiform. In Smitlismiiana the folds are not so close nor well defined; they 

 beino' shorter, and having their origin in a transverse stria below the suture. It is 

 also more pointed in the apex. The folds are whitish. The aperture is full one-half 

 the length of the shell. 



Goniobasis Decampii. PI. 23, fig. 45. 



Testa pllcata, inferne striata, subcylindrica, valde attenuata, tenui, cornea, evittata; spira subulata; sutu- 



ris linearibus, impressis ; anfractibus instar denis, subconvexls, superne plicis aliquanto flexis; 



apertura parvissima, subrhomboidea, intus albida; labro acuto, parum sinuoso; columella albida, 



incurva et contorta. 



Shell folded, striate below, subcylindrical, very much drawn out, thin, horn 



colored, without bands ; spire awl-shaped ; sutures linear, impressed ; whorls about 



ten, somewhat convex, with slightly bent folds above; aperture very small, subrhom- 



boidal, whitish within; outer lip sharp, somewhat sinuous; columella whitish, 



incurved and twisted. 



Proc. Acad. Nat. Sci., 1863, p. 154. 



Sa&.— Huntsville, Alab., Wm. H. DeCamp, M. D., Surgeon 1st Michigan Engineers 

 and Mechanics. 



My cabinet and cabinet of A. 0. Currier. 

 Diam. -17, I^^^S^h -72 inch 



Remarks.— This is a very distinct small species which is somewhat allied to Mela- 

 nia {Goniobasis) concinna (nobis), but may easily be distinguished by its having a less 

 number of folds, by the whorls being more convex and by being of a horn color. 

 Although very much the outline of G. rubella (nobis), it cannot be confounded with 

 that species as it is carinate. On all the specimens before me, about a dozen, there 



