﻿PLATE LXI. 



Hemiaster Morrisii, Forbes. 

 From the Grey Chalk. 



1 a. Test, upper surface, natural size. My collection. (P. 262.) 



b. Do. under do. do. 



c. Do. lateral view do. 

 Do. posterior do. do. 



e. Do. anterior do. do. 

 /. Apical disc, magnified. 



g. Portion of the dorsal plates, showing the peripetal fasciole, magnified. 



h. Ambulacral and inter-ambulacral plates, magnified three times. 



i. Tubercles and granules on the upper surface, magnified. 

 k. Tubercles and granules on the under surface do. 



