.\'J TURAL SCIENCE, VOL, XII. 



Plate IX 



A FOSSIL CUINOID 



Fig. I. — Restoration of CaUicrinus murchisonianus, after Angelin ; an arm remains 

 on the right, the others having been removed. Fig. II.— The circlet of plates around 

 the arms, seen from above. Fig. III. — The same circlet in C. costatus, after Angelin. 

 Fig. \\ .— '•' Cnjptodiscus," after Hall's original fignre. Fig. Y.— Call icrinuii costatus, 

 with the arms removed ; Br', the place of attachment of the arms ; i, ii, iii, processes, 

 some of which form the middle circlet of large spines in C. murchisonianus. The draw- 

 ings are by Jlr G. C. Chubb, and are larger than natural size. 



