FIG. 17. Jelly method. Large multinucleate form of the amoeba. Letters as in Fig. 5. 

 A B 



.,.. 



FIG. 18. Divisions induced in the resting winter spores of Polytoma granulom by auxetics (after Drew). 



A. Control and division in suprarenal extract and cadaverine. 



B. Free forms from induced divisions. 



40] 



FIG. 19. Photomicrograph of amoeba cysts. 



