2 Nuclearia 



3.ClaHirulina 



FIG. 8. Various forms of Heliozoa. 30., the entire animal ; jb, the flagellula ; 

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

 pods ; sk. siliceous skeleton ; sp. spicules. (From Biitschli's Protozoa, after 

 Schul/e and Greeff.) 



