OF DENISON UNIVERSITY 



95 



striae, of very nearly the same size on all parts of the shell ; striae 

 gently arching forward as they cross the side, and scarcely interrupted 

 at the little mesial longitudinal ridge, minutely crenate, and separated 

 by extremely slender linear furrows, numbering fifteen in the space of 

 one-tenth of an inch on all parts of the surface; crenulations of striae 

 twelve to fifteen in one-tenth inch." 



Length apparently about 3 inches. 



Compare O. siibcarbojiaria, M. and W. 



ConuJaria hyhlis, ^Vhite. 



Comdaria byhlis, White, Proc. Bost. Soc. N. H., Vol. IX, p. 22. 

 " Shell large, in the shape of a truncated pyramid, length twice (?) 

 the w^idth at the base, apex broadly rounded, smooth, sides depressed, 

 convex ; grooves at the angles narrow, a faint longitudinal depression, 

 along the middle of each side; transverse ridges narrow, distinctly 

 raised, forty-five or fifty to the inch, but slightly curved in passing 

 from the salient angles to the faint central depression, at which they 

 meet at an obtuse angle and cross with slight interruption ; sometimes, 

 however, they alternate for a short distance and then cross continu- 

 ously as before. Spaces between the ridges finely crenulate. Che- 

 mung beds at Burlington, la." Winchell states iurther that there are 

 small granulations ranged in a line along the crests of the ridges, 60- 

 75 of which occupy the space of an inch. He refers the "crenula- 

 tions between the ridges " to transverse bars developed between the 

 ridges in worn specimens. The septa range from 56-128 to the inch. 

 The septa-margins trend toward the base, but they are more nearly 

 straight from angle to centre than C. new4ierryi. Winchell's speci- 

 mens come from dark bituminous shales. Hickman Co., Tenn. 



This form has not been encountered in Licking county, hut is 

 quoted for reference. 



Sticto])ora striata, ^I-^H- 



(Plate XH, Fig. 40.) 



Beautifully preserved and abundant specimens of a Stictt)pora are 

 found in the nodules at Moot's run, and these can not be distinguished 

 with the time at disposal from the Hamilton sj)ecies quoted. Several 



