ENCRINITES. 
109 
P. clavellata, from near Lewes, is here represented. 
POLYPOTHECIA CLAVELLATA, IN FLINT. 
RADIARIA. 
Encrinites and Pentacrinites.* 
These names have long been applied to the 
petrified skeletons of those zoophytes that possess 
a pelvis or basin, composed of an immense number 
of crustaceous articulated plates, and ossiculat, 
supported by a jointed flexible column. 
* In the encrimtcs, the bones of the vertebral column are circular or 
elliptical ; in the jientacrimtcs they are angular or pentagonal. 
f Mr. Parkinson has sliown, that upon a moderate calculation, the 
lily encrinite must have been composed of nearly thirty thousand dis- 
