PLATE 14 



EXPLANATION OF FIGURES 



For doscriptions of figures 69, 70 and 72 see page 412. 



71 (1146) Centrifuged 4 hours, fixed 6 hours later. The first cleavage (/) 

 was nearly equatorial; the second cleavage spindle is at right angles to the first 

 in the upper cell, and nearly parallel with the first in the lower cell. 



400 



