\ / 



FIG. 22. Amoeba showing the effects FIG. 23. Quiescent forms of the amceba. One cyst for 

 of starvation. Note the bulging comparison. Note the few bacteria. 



out of the ectopliism. 



C)J 



-yj \ ' 

 /^^ ' / 



wJiii t% 



r 





. - .; 



Fio. 24. A group of cysts separated from living bacteria by 3-per-cent. formalin. Preparation 

 of " pure mixed cultures." 



52] 



12 4 



FIG. 25. 1-4, Division of an amoeba-like organism which, infected some of the cultures. 



