CONTENTS. 



VOL. I. 



A. 



ENDOSKELETON. 



Nos. 



PLANTS 15 



ANIMALS. 



POBIFEKA 612 



HYDROZOA 1314 



ANTHOZOA. 



CHEMICAL COMPOSITION 15 19 



STRTJCTTJBE AND MODE OF FOBMATION. 



Continuous, non-spicular 20 26 



Consisting in part or entirely of separate sclerites 



(spicules) 2728 



Modifications of the central supporting axis in 



the Gorgonacea. 



Containing coelenteric canals 29 31 



Solid, and secreted by a layer of special 



ectoderinic cells (calycoblasts) . . . 32 41 



ECHIXODERMATA 4247 



