PLATE 6 



EXPLANATION OF FIGURES 



33 to 38 Free hand drawings of stages in the process of absorption of indi- 

 vidual B by individual A of figures 33 and 34. 6., protoplasmic bridge sur- 

 rounding the row of yolk grains and connecting the sister cells A and B; ma., 

 membranelles of individual A; mb., membranelles of individual B; arrows 

 indicate the direction of ciliary currents. Full description and history on page 

 11 in text. 



32 



