PHYLUM PROTOZOA 



2.Nuc!ecma 



S.ClathruXina 



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

 c. vac, contractile vacuole; g, gelatinous investment; ««, nucleus; fisd, pseudo- 

 pods; sk, siliceous skeleton; sp> spicules. (From But§§hli's Protozoa, after 

 Schulze and Greeff.) 



