Fig. 32 



Fig. 33 



SS.V3 o 



^p|g^ ^o^>;: 



Q-^^5 o^-cjO /i O 6 



^o 



Fig. 36 



Fig. 37 



Fig. 38 



ation of 

 ypertoni 



FIG. 38. Another type of "black cytolysis." 



FIGS. 32-37. Typical disintegration of a sea-urchin egg, which had been 

 treated for some time with aerated hypertonic sea-water. 



