212 VERA DANCHAKOFF. 



PLATE II. 



FIG. 3. Small region of the peripheral zone around a tumor focus of 4 days 

 growth, showing a group of healthy tumor cells (H Tc) and numerous other tumor 

 cells in various stages of disintegration. 



F'iG. 4. Small area of the peripheral zone around a tumor focus of 4 days 

 growth, illustrating the disintegration of the tumor cells within the vacuoles, 

 formed by the splenic mesenchymal cells. 



