B 





4-^ 





# 



■f^ 





^^H^ 





Fig. 1. Solation of the plasmagel of the pseudopodia of Amoeba 

 duhia. In A, the specimens are at low pressure (1,500 Ibs./in.-). Note 

 that characteristically the pseudopodia are elongate cylinders. 

 B shows the same specimens 1 second after raising the pressure to 

 6,500 lbs. in.- Due to the greater fluidity of the plasmagel, each 

 pseudopodium undergoes a rapid reorganization, tending to become 

 spherical as a result of the tensional forces of the surface. 



