PLATE 2 



EXPLANATION OF FIGURES 



A and B Low power, camera lucida drawings of two sister cells stained to show 

 fat 42 hours after separation. Cell A was not fed; cell B was fed olive oil 18 hours 

 after separation from sister cell. The large drop of oil in B represents that re- 

 maining in the vacuole, a and b, high power, camera lucida drawings in one 

 focal plane of area indicated by squares in A and B, respectively. 



42 



