J\'^f'/r S])('cics of Fossils froii) Oln'o. 'Z'Z^i 



sides, above the middle of the sub-radial plates, gradually and almost 

 evenlj^ curving. Centre of the calyx below deeplj' impressed, the cavity 

 embracing -the basal and inner half of the sub-radial plates. Basal plates 

 very small, extending but little be3a)ncl the circumference of the proportion- 

 ally small column, and forming by their union a somev^'hat regular penta- 

 gon. Sub-radial plates of medium size, four of them being equal, and 

 pointed at their upper ends, the upper edges being convex ; the fifth plate 

 is larger than the others, and is truncated above by the very small first anal 

 plate, which rests between the adjacent first radials, and has apparently 

 joined three other plates above. The surface of this plate bears a snigle 

 round granulose tubercle. First radial plates nearly twice as wide as high; 

 their lateral faces being short and uniting with those of the adjacent plate, 

 except on the anal side, where they are separated by the first anal plate. 

 Articulating face for the second radials nearly straight, but deeply grooved. 

 Second radial plates short; that of the anterior ray being cuneiform above, 

 and has supported an arm-plate on each upper sloping surface. The second 

 radials of the other rays have not been fully determined ; but on the an- 

 tero-lateral rays, where partially detached plates remain, they have been 

 quadrangular, as if for the suj^port of other radial plates in a direct series. 

 Surface of the inner half of the sub-radial plates smooth, while the outer 

 half and the entire surface of the other plates are covered with proportion- 

 ally large, distinct, irregular tubercles, which are flattened on their surfaces 

 and covered with numerous small, distinct granules. The granules also 

 extend to parts of the intermediate surface. The upper margin of the first 

 radial is bounded by an elevated transverse ridge, which is also granulose. 



This species bears considerable resemblance in its general sur- 

 face-markings to Eupacliycrinus tuhercidaius, M. and W, (Geol. 

 Snrv. Ills., Vol. Y, PI. 24, Figs, a, h), but the tubercles are 

 Tery distinctly granulose. It, however, does not possess the 

 structure of Eujuichycrinus, having only one small anal plate, 

 the npper end of which projects above the line of tbe first radials. 

 The only specimen yet obtained of the species measures about 

 three-fourths of an inch in diameter, and is about three-six- 

 teenths of an inch high to the to]) of the first radial plates. 



Formation and Locality. — In the Coal-measures at Carljon 

 Hill, Hocking Co., Ohio. Collected by Mr. Somers, of Colum- 

 bus, Ohio. 



Zeacrinus Mooresi, n. sp. 



Pal. O., Vol. Ill, Plate 11, Figs. 6—10. 



Form of entire body unknown. Calyx of moderate size and pentagonal 

 in outline, very broadly cyathiform or shallow cup-shaped ; the region of 

 the basal plates being impressed, and the radials but moderately curving 



