Top view 



Pseudopodia 



Side view 

 Arcelia, with a secreted shell 



Actlnophrys, with needle- 

 shaped pseudopodia 



Pseudopodia 



G/obigerina, with several com- 

 partments of different sizes 



OdI 



Difflugia, with a shell 

 of sand grains 



Figure 17. Various representatives of Sarcodina. Highly magnified. 



40 



