OP CONCHOLOGT. 263 



VOLUTA, Linnaeus. 

 YoLUTA Newcombiana. — t. 27, f. 12. 



Description. — Shell strong and robust; volutions six or 

 more, moderately convex in tlie younger stages of growth, 

 becoming more ventricose, and finally angular in the upper 

 part of the body whorl; suture distinct; aperture about four 

 times as long as wide, angular above, and deeply notched at 

 the base, forming more than one-half the length of the shell; 

 columellar folds four, very strong, the upper one transverse, 

 the lower ones more oblique; outer lip thick and smooth; 

 surface marked only by distinct lines of growth. 



Dimensions. — Length 3| inches, diameter If inches. 



Locality. — Six miles above Claiborne, Alabama. 



MITRA, Lam. 



MiTRA Hale ANUS. — t. 27, f. 6. 



Description. — Shell broadly-fusiform ; spire moderately high, 

 broadly conical, pointed; body whorl ventricose, somewhat 

 angular, and with a strongly concave space in the upper part ; 

 suture bordered below by an elevated nodose ridge ; columella 

 produced below, marked near its middle by three somewhat 

 oblique equidistant folds ; surface marked by numerous small, 

 longitudinal folds, which form nodes on the angular part of 

 the volutions, and become obsolete just below their middle ; 

 the entire surface is marked by slightly alternating revolving 

 grooves, which cut the folds, and give to the upper part of 

 the volution a strongly cancellated or rasp-like appearance; 

 most specimens have an intermediate revolving line in the 

 concave part of the volution. 



Locality. — Yicksburg, Miss. 



MiTRA BICONICA. 



Description. — Shell slender, fusiform; spire elevated; volu- 

 tions six or seven, slightly convex, with a narrow depression 

 just below the upper margin; suture well marked; body 

 whorl somewhat gradually tapering below its most convex 

 portion; aperture long and narrow; columella strong, with 

 two distinct, very oblique folds a little above the middle of its 

 length; surface of the volutions marked by strong longitudi- 

 nal folds, about nine on the body whorl; entire surface cov- 

 ered with very fine revolving striae. 



Dimensions, — Length of specimen f inch. 



Locality. — Six miles below Prairie Bluff, Alabama. 



