98 EDWIN G. CONKLIN 
Fig. 32. From the same slide as the preceding. Though the macromeres differ 
in size and protoplasmic content, the micromeres are all of the same size. 
Fig. 33 Centrifuged ten minutes in gum arabic; fixed four hours later. The 
protoplasmic macromeres are dividing earlier than the others. The size of the 
micromeres does not depend upon the quantity of cytoplasm in the macromeres 
from which they came. 
Fig. 34 Centrifuged two and one-half hours; fixed twenty-one hours later. The 
size of the micromeres is almost irrespective of the size of the macromeres; also 
it is nearly independent of the amount of cytoplasm in the macromeres. 
Fig. 35 Centrifuged thirty minutes during the first cleavage; fixed twelve hours 
later. The micromeres from the protoplasmic macromeres are but little larger 
than those from the yolk cells. 
Fig. 36 From the same slide as the preceding, showing essentially the same 
conditions. 
Fig. 37. From the same slide as the preceding. The cell 4c forms at the same 
time as 4d, though in normal eggs it is formed much later. 
