140 NEW UNIONID^, MELANID^, ETC., 



Hab.—GaiJ Creek and Spring, Cumberland Gap, E. Tenn., Major S. S. Lyon, U. 



S. E. 



My cabinet and cabinet of Major Lyon. 

 Diam. -23, Length -80 inch. 



Remarlcs. — A number of specimens were sent to me by Major Lyon ; these were 

 all covered with oxide-of iron or carbonate of lime. On removing this the epidermis 

 was found to be a dark brown, and a light band was revealed which follows the 

 whorls immediately under the suture. Some of the specimens have transverse 

 revolving stria on all the whorls ; others only on the apicial whorls. The strongest 

 stria is in the middle of the whorl, and this is sometimes large enough to make quite 

 a carina. In form and size it is near to Melania (Ooniobasis) strigosa (nobis), but 

 that species is more acuminate and is of a light horn color without a band. They 

 cannot be confounded. The aperture is about one-fourth the length of the shell. 



GONIOBASIS VIRIDISTRIATA. PL 23, fig. 48. 



Testa virido-striata, fusiformi, subtenui, luteo-olivacea ; spira obtuso-conica ; suturis irregulariter impressis ; 

 anfractibus instar quinis, convexiusculis, superne granulatis, inferne striatis; apertura parviuscula, 

 ovata, intus vittata; labro aouto, vix sinuoso; columella aliquanto inflecta et coutorta. 



Shell with green strife, fusiform, rather thin, yellowish olive; spire obtusely 

 conical ; sutures irregularly impressed ; whorls about five, somewhat convex, granulate 

 above and striate below; aperture rather small, ovate, banded within; outer lip 

 acute, scarcely sinuous ; columella somewhat bent in and twisted. 



Operculum subrotund, very small, very thin, light brown, with the polar point on 

 the left near the middle. 



Proc. Acad. Nat. Sci., 1864, p. 4. 



Edb. — Flint River, Geo., Bishop Elliott and Mr. Gesner. 



My cabinet and cabinet of Bishop Elliot, Dr. Lewis, and Mr. Gesner. 

 Diam. -22, Length -58 inch. 



Remarks. — This pretty little species has very much the appearance of some of 

 the young Melania ( Gonidbasis) Boyldniana (nobis), and at first I thought it was such. 

 But although it has the same green striae, which embellish the whole of the whorls, 

 it differs in being a smaller species, in not being angular, and in being without folds 

 on the lower whorls. It is also closely allied to Alhanyensis, herein described, but 

 that species is larger, with flatter whorls and much more granulate. The viridistriata 

 has usually ten raised, nearly equidistant stria3, which are of a dark green color and 

 are plainly visible through the diaphanous whorl. The aperture is about two-fifths 

 the length of the shell. 



