GASTROPODA— SUBULITID2E. 



701 



comparatively short and contracted. Columellar fold strong. 

 Coal measures of Ohio and Kentucky. 



FlG. 1007. Soleniscus regularis. 

 Whitfield, N. Y. Acad. Sci. Proc. ) 



After 



Fig. 1008. Soleniscus klipparti. 

 (Pal. Ohio, II.) 



316. S. klipparti Meek. (Fig. 1008.) Carbonic. 



Last few whorls irregular, elongate, flattened, upper part of 

 spire normal ; columellar fold strong. 



Coal measures of Ohio. 



LXXXIX. Sph.£RODOMA Keyes. 

 Like Soleniscus, but short, thick, and more or less globular ; 

 body whorl generally very convex. Devonic-Carbonic. 



317. S. hamiltoniae Hall. Devonic. 

 Four or five volutions rapidly enlarging, body 



whorl ventricose ; base of lip scarcely notched. 

 Hamilton of New York, Pennsylvania, etc. 



318. S. intercalare (M. and W.). (Fig. 1009.) 



Carbonic. 



Medium-sized, with regularly but rapidly enlarg- 

 ing whorls, the last one about two thirds the entire 

 length. 



Coal measures of Nebraska, Illinois, Pennsyl- 

 vania, and West Virginia. 



319. S. mediale M. and W. (Fig. 10 10, a y b.) 

 Subovate, spire short, gently convex, body whorl moderately 



ventricose, columellar fold obtuse, notch shallow. 



Fig. 1009. 



Sphcerodoma in- 

 tercalare. (After 

 Meek and Worth - 

 en, 111. Pal., II.) 



Carbonic. 



