MONOGRAPH OF THE EXISTING CRINOIDS. 137 



the alcyonarians, but a spicular skeleton suddenly grafted upon a diffusely calcified 

 dermal investment of the most primitive crustacean type. 



FIG. 84. LATERAL VIEW OF A SPECIMEN OF EUDIOCRDTCS FINNATUS FROM THE LESSER SUNDA ISLANDS, SHOWING THE 

 RELATIVE PROPORTIONS OF THE ARMS, PINNULES, CZNTRODORSAL, AND CIRRI. 



In certain of the early cystideans the body wall appears possibly to have been 

 more or less chitinous; at least it docs not seem to differ in any way from the body 

 wall of the crustaceans which are found associated with them; but in the great 



79146 Bull. S2 13 10 



