NEW MELANID^ OF THE UNITED STATES, 337 



Goniobasis Shastaensis. PL 38, fig. 199. 



Testa striata, subcylindraeea, subtenui, tenebroso-cornea, fasciata ; spira elevata, ad apicem plicata ; suturis 

 valde impressis ; anfractibus convexis; apertura parva, ovata, intus albida; columella lasvi, incurvata 

 et reeurvata. 



Shell striate, subcylindrical, rather thin, dark horn-color, banded ; spire elevated, 

 folded at the apex ; sutures very much impressed ; whorls convex ; aperture small, 

 ovate, white within ; columella smooth, incurved and recurved. 



Operculum ovate, the polar point being near the left side and below the middle. 

 Melania Shastaensis, Lea, Proc. Aead. Nat. Sci., April 1st, 1856. 



Hah. — Shasta and Scott Rivers, California, Dr. Trask; and Fort Uinpqua, 0. T., 

 Smithsonian Institution. 



My cabinet and cabinets of the Smithsonian Institution. 

 Diam. -34, Length 1-05 inch. 



Remarks. — Nearly thirty specimens of this species were kindly sent to me by 

 Dr. Trask. The form and size of this species is very much the same as 

 Melania {Goniobasis) Virginica, Say. It differs in the form of the aperture, in 

 having but a single revolving wide band, and in being more cylindrical. The 

 Shastaensis varies like the Virginica, in being very uncertain as to striation. 

 Some of the specimens are covered with minute revolving strise, while others are 

 almost entirely destitute of them. In every specimen before me, there is a broad re- 

 volving brown band on the middle of the whorls, more or less distinct, and always with 

 more intense color on the superior whorls. This band often becomes obsolete on the 

 inferior whorls, but when that is not the case, it may be seen within the aperture also. 

 A few of the specimens have the columella slightly purple. Every specimen in my 

 possession has the apex eroded, so that the number of whorls cannot be with cer- 

 tainty stated. I should suppose the number to be nine or ten. Some of them are 

 sufficiently perfect to show several upper whorls with regular folds. The aperture is 

 probably rather more than one-fourth the length of the shell. 



Goniobasis negata. PI. 38, fig. 200. 



Testa, striata, elliptic^, subeoniea, crassa, luteola, quadrivittata ; spira obtuse eoniea ; suturis valde et ir- 

 regulariter impressis ; anfractibus senis, convexiuseulis, ultimo grandi ; apertura parviuscula, ovata, 

 intus albida et quadrivittata ; labro acuto, incrassato ; columella inflecta, inerassata, ad basim obtuse 

 angulata. 



Shell striate, elliptical, subcorneal, thick, yellowish, four-banded ; spire obtusely 



conical ; sutures very much and very irregularly impressed ; whorls six, somewhat 



convex, the last large ; aperture rather small, ovate, white within, and four-banded ; 



outer lip sharp, slightly thickened ; columella bent in. thickened, obtusely angular at 



the base. 



86 



