58 GERM-CELL CYCLE IN ANIMALS 
end which we have called the pole-plasm, and ap- 
parently all of the pole-plasm, together with this 
Fig. 17.— Miastor americana. Longitudinal section of egg with one 
germ cell (p.g.c.) and nuclei undergoing chromatin-diminution pro- 
cess. c=cytoplasm; cMp=chromosome middle plate; cR= 
chromatin remains. 
nucleus, is then cut off from the egg (Fig. 17). This 
cell, as has been conclusively proven by studies of 
