562 NORTH AMERICAN INDEX FOSSILS. 



189. C. stellatus Hall. Siluric. 

 Form more depressed than that of C sajfordi, basal area larger 



and more open, and plates finely granular, the granules forming a 

 somewhat stellate pattern. (Type of genus.) 



Manlius of New York, Maryland and West Virginia. 



190. C. saffordi Hall. (Fig. 1898.) Devonic. 

 Calyx spherical, often unsymmetrical owing to its unequally 



developed lobes (usually five). As in the other forms, the walls 



Fig. 1898. Camarocrinus saffordi. Basal bulb, lajteral view, with external layer 

 removed over part of surface to show plated subsurface layer ; also enlargement of the 

 area of stem attachment. ( After Hall. ) 



separate readily into an inner and an outer layer, with spongy 

 interspaces. 



Helderbergian of Tennessee. 



Order IV. FLEXIBILIA Zittel. 



LXXL Cleiocrinus Billings. 



Calyx large, conical or pear-shaped. IB probably 3 and B prob- 

 ably 5, all small and hidden by the column. First visible plates 

 are a ring of 10 plates, the R and IR. The posterior IR supports 

 a longitudinal row of anal plates which extend to the top of the 

 calyx. The rays and their divisions following the R are laterally 

 connected, with no more IR between them except at the anal side. 

 Ordovicic. 



191. C. regius Billings. Ordovicic. 



Calyx elongate-conical, one and three fourths inches long, with 



width near the top of one inch. Final divisions of rays about 40, 



