PROTOZOA 



19 



a stalked genus, has a spherical sUiceous shell perforated by 

 numerous openings. 



Fig. 14. — A portion oiActino- 

 aphaerium Eichhomii, 

 Elirl)., highly magnified, 

 seen in optical section. 

 From Bronn. 



1. Nuclei. 



2. Ectoplasm. 



3. Endoplasm. 



4. Pseudopodia with axis. 



5. Food mass in food vacuole. 



Fig. 15. — Glathmlma elegans, Cienk. 

 X 150-200. From Bronn. 



1. Stalk. 



2. SheU. 



3. Pseudopodia protruding through apertures 



in shell. 



