PHYLUM PROTOZOA 



2Nuclearia 



3-Claf-hruJina 



Fig. 8. —Various forms of Heliozoa. 3a, the entire animal; 36, the flagellula; 

 c. vac, contractile vacuole; £-, gelatinous investment: uh, nucleus; />sd, pseudo- 

 pods: s/c, siliceous skeleton; sp, spicules. (From Biitschli's Protozoa, after 

 Schulze and Greeff.) 



