290 ANATOMY AND PHYSIOLOGY OF THE SPONGIADJE. 



Stfb- Order 7. 



PIG. 



3S1. DYSIDEA FRAGILIS, Johnston.- See Fig. 271 for a 

 portion of the skeleton, and Figs. 270 and 272, 

 Plate XIV, for fibres of the skeleton. 



PRINTED BY J. E. AULA11D, BARTHOLOMEW CLOSE. 



