20 KANSAS UNIVERSITY QUARTERLY. 



lacing of the arms prevents the tracing of any to the extremity. A 

 photograph of a portion of the slab will be given in a future number 

 of the Quarterly; for the present, the following description and 

 figure, by Mr. B. H. Hill, student in paleontology in the University, 

 will be of interest. 



The horizon of Uhitacriiius in Kansas seems to be confined to near 

 the middle of the Niobrara. All the sj^ecimens hitherto discovered, 

 of which I have any knowledge, have come from the vicinity of 

 Elkader on the Smoky Hill, though in all probability, they will be 

 found on both the Solomon and Saline. 



S. W. Willi STON. 



In life, Ciiitixcriiiiis socialis was evidently subglobose in shape, 

 and about two inches in tliameter. In place of the sub-basal plates 

 of the stemmed crinoids, there is a small, five-sided, centro-dorsal 

 ])late, around which are grouped fi\e pentagonal basals, the two 



XX^""" 



C0W. 



'<}- 



DiaKiMiii (if I'iiitui-rinii't .loriali.i ( h-iiuielL 



longest sides of which meet in a sujjerior angle. The radials are 

 fifteen in number, arranged in series of three. The first radial is 

 the broadest, broader than high, heptagonal in shape, the third 

 pentagonal. The two superior facets of the third radials give 

 support to two series of secondary radials, the proximal three of 

 which are its supports. The arm plates are thin and round, and 

 radiate in structure. The arms themselves are ten in number. In 



