X. ITU HAL SOIKXC/^, ]'(>!., X 1 1. 



I'r,ATK IX 



A FOSSIL CRINOID 



Fig. I. — '^e^iox&tiow o{ Call icrinus murcMsonianus, after Angelin ; an arm remains 

 on the right, the others having been removed. Fig. II. — The circlet of plate.s aronnd 

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

 Fig. IV. — '' Cryptodiscns," after Hall's original fignre. Fig. Y.^CaUicrinus costattis, 

 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 s}iines in C. murcMsonianus. The draw- 

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



