GONIOBASIS. 24:1 



Observations. — This is a robust, small species which seems not to 

 have been before noticed. It was found by Mr. Nicklin Fig.4G7. rig.468. 

 iu a small stream of cold water at the Hot Springs in 

 Virginia. It is amongst the smallest species I have 

 seen. The purple color of the interior of most of the 

 specimens gives the shell a very dark appearance. I owe to the 

 kindness of Mr. Nickliu, to whom I dedicate it, the possession of 

 several specimens of this species. — Lea. 



131. G. aterina, Lea. 



Goniobasis aterina, Lea, Proc. Acad. Nat. Sci., p. 153, May, 1833. 



Description. — Shell smooth, subfusiform, black or greenish-black. 



Fig. 469, thick; Spire obtuse; sutures regularly impressed; whorls 



A six, convex ; aperture rather large, subovate, within purple, 



^mk aliquanto? vi\\\te; lip acute, ri^cPsinuated; columella inflected, 



^/ purple, thickened and contorted. 



Habitat. — Gap Spring, Cumbex'land : Gap and Eogers' Spring, west 

 of Fiucastle, East Tennessee; Capt. S. S. Lyon, U. S. Army. — Lea. 



Resembles ebenum, Lea, in color and texture, but is a smaller, 

 narrower species, more angulate at the periphery. It is not an 

 uncommou species. 



132. G. Binneyana, Lea. 



Goniobasis Binneyana, Lea, Troc. Acad. Kat. Sci., p. 2G6, 1802. Jour. Acad. Nat. 

 Sci., V, pt. 3, p. 310, t. 37, f. 152, March, 1863. Obs., ix, p. 132. 



Description. — Shell smooth, obtusely fusiform, rather thin, very 

 much inflated, dark olive, obscurely banded ; spire depressed ; sutures 

 impressed ; whorls Ave, flattened above, the last one ventricose ; ap- 

 erture very large, subovate, dark within ; outer lip acute, slightly 

 sinuous ; columella thickened, spotted at the base. 



Habitat. — Coosa Eiver, Alabama; Wm. Spillman, M.D. 



Diameter, -29 ; length, -53 of an inch. 



Observations. — Only two specimens wei'e received from Dr. "Wm. 

 Spillman. The smaller one is rather the thicker. It has very rip^lTO. 

 much the outline of Lithasia Shov:alterii (nobis), and at first _ 

 I thought it was only a variety of that species, but the absence t, ^',^jJ 

 of a callus above and below on the columella, and a clianncl at 

 the base preclude its being a Lithasia. It is nearly allied to Melania 



L.F. W. 8. IV. 16 



