552 



SHINICHI MATSUMOTO 



TABLE 1 



Cultures in plasma 



combinations of several types of movement are often to be seen 

 in a sing;le preparation. 



During the period of activity, a change in the type or direction 

 of movement was often observed, and such a change in one part 

 was apt to modify the movement of neighboring cells. Single 

 cells or small groups of cells, as a rule, moved more freely than 

 those in the spreading membrane. The consistency of the plas- 

 ma, the liquefaction and the contraction of the fibrin influence 

 both the rapidity and the type of movement into the plasma. 

 The temperature has both direct and indirect influences on the 

 movement. There is also individual variation which cannot be 

 attributed to any of the above factors. For these reasons, the 

 velocity of the epithelial movement varies from hour to hour, 

 and it is very difficult to analyze the factors influencing it. 



Usually, the most vigorous actiyity occurred during the first 

 twenty-four hours. For instance, the epithelium on a piece of 



