302 NEW MELANIDiE OF THE UNITED STATES. 



sutures impressed ; whorls six, somewhat convex, with small folds ; aperture rather 

 large, elongately rhomboidal, whitish within; outer lip acute, sinuous; columella 



bent in and twisted. 



Proo. Acad. Nat. Sci., 1862, p. 268. 



Bob. Tennessee, Prof. Troost ; and Duck Creek, Tennessee, J. Clark. 



My cabinet and cabinet of Mr. Clark. 

 Diam. -26, Length -64 inch. 



Remarks. — Two specimens only are before me. That from Mr. Clark which I be- 

 lieve was collected by Prof. Christy, is of a lighter color than the other, which is 

 brownish, and may even prove to be a distinct species, as it is slimmer and is rather 

 smaller in the aperture. The folds are delicate, inclining to the right, and do not 

 reach to the body whorl. There are indistinct stria? on the upper part of the whorls 

 decussating the folds. It is about the size and nearly the same outline as inosculata 

 herein described, but that is a carinate species with a somewhat differently formed 

 aperture. The aperture is more than one-fourth the length of the shell. 



GONIOBASIS VIRIDICATA. PI. 38, fig. 172. 



Testa plicata, subattenuata, tenui, viridescente, evittata, ; spira cone-idea, subattenuata ; suturis impressis ; 

 anfraetibus instar septenis, planulatis, plicis subcrebris; apertura parvissima, rhomboidea, intiis cseruleo- 

 alba: labro acuto, parum sinuoso ; columella incurva, superne flavescente, inferne albida, contorta. 



Shell folded, somewhat drawn out, thin, greenish, without bands ; spire conical, 

 exserted ; sutures impressed ; whorls about seven, flattened, with rather close folds ; 

 aperture" very small, rhomboidal, bluish white within ; outer lip acute, somewhat 

 sinuous ; columella bent in, yellowish above, whitish below and twisted. 

 Proc. Acad. Nat. Sci. 1862, p. 268. 



Bab. — Grayson County, Kentucky, S. S. Lyon. 



My cabinet and cabinet of Mr. Lyon. 

 Diam. -24. Length -64 inch. 



Remarks. — Three specimens were sent to me by Mr. Lyon, taken on his geological 

 survey of Kentucky. It is a graceful greenish little species with the folds inclining 

 to the left, and with a paler line below the suture. The body whorl has no folds, 

 but is in two of the specimens covered with minute irregular veins. The middle 

 whorls are plicate, while the apicial whorls are carinate and striate. It is about the 

 size of cerea herein described, but differs in outline and other characters. In outline 

 it is near Doolyensis, herein described, but is a much smaller species, and differs in the 

 folds and the aperture. The aperture is about one-third the length of the shell. 



Goniobasis Leidyana. PI. 38, fig. 173. 



Testa plicata, fusifornii, subtenui, luteo-cornea, evittata; spira obtuso-conica ; suturis linearibus; an- 



