﻿CARBONIFEROUS SERIES OF THE WESTERN STATES. 7:> 



B. Urii, Fleming. — PL IX. fig. G, «, b, c. 



This figure is given on account of possessing a perfect mouth, which noue of those 

 figured by De Koninck and Phillips have. 



Geological Position and Localities. — This species is very abundant in the coal 

 measures, at Galatia and Grayville, Illinois, and on the Wabash, five miles below 

 New Harmony, Indiana. 



Explanation of the Figures. — PI. IX. fig. 6, a. View of the back. 



Fig. 6, b. View of the mouth of the same. 



Fig. 6, c. The same seen in profile. 



Illinois State Collection. 



PLEUROTOMARIA. 



P. Grayvillensis, nob. — PI. IX. fig. 7, a, b. 



Shell small, being about half an inch in breadth and the same in length. Whorls 

 five, flattened above ; the body whorl rounded t below. Spiral angle 102°. Shell 

 covered with longitudinal lines, crossed by lines of growth, giving it the appearance 

 of being garnished with small tubercles. The upper line of tubercles on each whorl, 

 near the suture, is much more prominent than the others, forming a raised ornamental 

 band. The band of the sinus is large, and separated from the inferior part by a fur- 

 row. Mouth sub-quadrangular; exterior lip sharp; columella lip thickened, the 

 columella terminating below in a point. 



Geological Position and Localities. — This species occurs in the coal measures, and is 

 quite common in the shales near the mouth of Rush creek, Posey county, Indiana, 

 and Grayville, Illinois. It is also found near Shawneetown, and in the neighborhood 

 of Galatia, Saline county, Illinois. 



Explanation of the Figures. — PI. IX. fig. 7, a. A specimen of the ordinary size, ex- 

 hibiting a front view. 



Fig. 7, b. The opposite side of the same. 



Illinois State Collection. 



P. CARBONARIA, nob. — PI. IX. fig. 8. 



Shell of medium size. Length, 1 inch ; breadth, 1 l-20th inch. Whorls five, 

 rounded, covered with strongly raised, sharp, longitudinal ribs, the grooves or furrows 

 between which are rounded, and much broader than the ribs themselves. The sinus 

 consists merely of a broader groove, in which there are two or three raised ribs similar 

 to those on the remainder of the shell, but much smaller. On the inferior half of 

 each whorl, below the sinus, both the ribs and furrows are much smaller than those 

 on the upper portion Mouth nearly semicircular ; lip sharp. 



20 



