PLATE XX. 



Pentacrinus WYViLLE-THOMSONi, Jeffreys. 



Diain. Puge 

 Kig.'5. l-o. The riug of united basals, . . . . . x 10 282 



Fig. 1. From below. 



Fig. 2. From above. 



Fig. 3. From the side. 



Fig. 4. The central plug of limestone network within the ealvx ; from 

 above, ....... 



Fig. 5. The same ; from below, ..... 



Fig. 6. Interior view of the calyx, after removal of two radials and 

 one basal, ....... 



Figs. 7-9. The ring of united radials, ..... 

 Fig. 7. From the side. 

 Fig. 8. From above. 

 Fig. 9. From below. 



