(7a) 



Figure 1. 

 Dorsal view of living ir.dividual of Centropyxifi aculeata 

 X 450. 



mouth 



protoplasm 



shell 



P^igure 2 , 



Sagittal section of a specimen of Centropyxix aculeata. 

 X 500. 



shell protoplasm 



nucleus 

 ciiromidial body 



