BEEDE: UPPER PERMIAN RED BEDS. 163 



PELEOYPOD, sp. 



Shell small, subelliptical ; beak moderately prominent, pro- 

 jecting, located more than a third the distance from the an- 

 terior to the posterior end of the shell. Hinge straight or 

 very slightly arcuate, much shorter than the shell No indi- 

 cations of cardinal characters visible. The margin in front 

 of the beaks slopes obliquely to the end of the shell, where it 

 rounds off in an elliptical curve to the base, which is nearly 

 straight, but somewhat convex. It rounds in an elliptical 

 curve to the hinge, which it meets at a very obtuse angle. 

 The entire valve is moderately convex, most convex on the 

 umbo. Surface marks unknown. Length, 6 mm. ; height, 

 3.5 mm. 



Dozier, Tex. ; very rare. 



The generic as well as the specific characters of this shell 

 are not sufficiently shown to make an attempt at identifica- 

 tion worth while. 



PLEUROTOMARIA CAPERTONI. n. sp. 



Plate VIII, figures 9-9c. 



Shell small, robust; whorls five, quite convex, rapidly en- 

 larging, sutures deeply impressed. Below the suture and 

 above the band there are three, occasionally but two, re- 

 volving lines, the lowermost of which is the largest. The 

 keel is large and rounded, with a moderately narrow concave 

 band below it. The band has a minute, thread-like revolving 

 line in the center. The lower side of the band is bordered 

 by a ridge smaller than the upper one. There are six revolv- 

 ing lines on the body whorl below this ridge. One of these 

 appears on the spire between the band and the suture. The 

 mold shows crowded, sharp growth lines transverse to the 

 whorls, which appear to arch backward on crossing the band. 

 Apical angle, 45-50 degrees. 



Dozier, Tex. ; Whitehorse spring, Oklahoma. 



This species is closely related to Worthenopsis kschertianx- 



