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. 



FlG 8.-LATEHXL V,EW OP A SPECn.EK OF EUB.OCUNVS PINNATVS KHOM THE LESSEH SuNDA ISLANDS, SHOWUCO T„E 

 REUTTVE PROPORTIONS OF THE ARMS, PINNULES, CENTRODOR3AI, AND CIRRI. 



In certain of the early cystideans the body w^ill appears possibly to have been 

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

 waU of the crustaceans wliich are found associated with them; but ni the great 



79140°— Bull. 82—15 10 



