PLATE 2 
EXPLANATION OF FIGURES 
11 and 12 Growing eggs showing extreme nucleolar fragmentation. Note the 
delicate, fine grained reticulum in the nucleus. The two eggs were treated by 
different killing fluids and stained in different ways. X 1228. 
13 Large growing egg. Nucleolus represented only by small fragments lying 
in vacuoles in the nucleus. In certain parts of the nuclear reticulum the chroma- 
tin is forming strands. X 1228. 
14 Egg near the end of the growth period. Nucleolus in fragments, the nuclear 
reticulum growing denser at the nodes. X 1228. 
15 Egg nearly mature, the nucleolar fragments mostly in a ring near the peri- 
pheny of the nucleus. The whole nuclear reticulum is becoming denser and more 
deeply staining. X 1228. 
16 Egg at the end of the growth period. The nucleolar fragments, within 
vacuoles, are of different composition, as shown by the different reactions to stains. 
Chromatin in the reticulum forming strands. X 1228. 
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