384 



Zoological Society : — 



interspaces between the ribs are thin, calcareous, prominent exter- 

 nally, and pierced with numerous perforations. The cavity of the 

 cells is filled with a fleshy sponge-like body, strengthened by nume- 



Carpenteria. 



Fig. 1. 



Fig. 2. 



Fig. 1. Exterior surface complete. 



Fig. 2. Partly eateu off by acid. a. Complete. 



Fig. 4. 



Fig. 3. 







M 



Wf^^ 



Fig. 3. Cross sunken cells, showing the spicula in the cells. 



Fig. 4. Part of Fig. 3, more magnified, a. Outer parietes of cells. 



rous minute, simple, pin-shaped and fusiform smooth spicula placed 

 ill l)Uiidk'S. 



