105. CONTRIBUTION TO 



The basal plates are fully half the height of the fossil. 



The five radials are of equal size in perfect bodies. 



The ventral opening is small and perfectly round. 



The radial depressions are broad and the anal opening *is rather smalL 



Found by Mr. John Hammell of Madison, Indiana. 



Horizon, locality and collection, same as the last, 



STEPHANOCRINUS QUINQUEPARTITUS, N. Sp., (Rowley) 



Plate 32. Figs. 31, 32, 33. 



This pretty little crinoid has a triangular base. 



The place for the attachment of the small column is a little excavated. 



The basals are three and hardly of equal size and about half the height of 

 the body to the base of the interradial processes. 



These latter are directed almost straight upward and absolutely perfect in 

 the specimen figured. 



The anal process is shorter than the rest and is pierced above by the anal 

 opening. 



There is an apparent minute perforation in the top of each of the other 



processes. 



The central opening and radial grooves are covered, but the nature of the 

 plates can not be made out by the aid of a hand glass. 

 The general form of the entire body is obconical. 

 Found by Mr. John Hammell, of Madison, Indiana. 

 Horizon, locality and collection, same as the last. 



GENNyEOCRINUS COMPTUS, N. Sp., (Rowley.) 



Plate 33. Figs. 1, 2, 3. 



This beautiful crinoid has a slightly inflated dorsal cup, strongly lobed 

 arm-base-groups and low convex ventral disk with a stout, short central spine. 



The three bas^al plates form a low expansion, broken at the inter-suture 

 lines by distinct clefts. As in some other species of this genus, the cross ridge- 

 like elevations or central nodes of the first radial plates are more conspicuous 

 than the basal nodes, while the reverse is the case in the associated species of 

 Aorocrinus with their greatly developed unbroken basal rim. 



