A 
Fi". A. — Early prophase 
of 1st Maiotic Division 
from Testis of Guinea 
pig, showing Chromatin 
centres. 
3 
Fig. B. — Prophase of 1 st 
Maiotic Division, showing 
Synaptic Contraction and 
Chromatin centres. 
C 
Fig. C, — Later stage of 
Synaptic figure than B. 
The loops are still 
unsplit. 
D 
Fig. D. — Later stage of 
Synaptic figure. The 
loops are beginning to 
show double beading, and 
the Chromatin centres 
are separating from one 
another on the surface of 
the nuclear membrane. 
Fig. E. — Later stage, showing 
the formation of the coarse 
spireme through the complete 
separation 01 the Chromatin 
centres. The threadwork 
shows the double-beading and 
splitting. 
F 
Fig. F. — Later stage, showing 
the split threadwork of the 
loops, the split extending to 
their ends. 
Fig. G. — Still later stage, 
showing the formation of the 
gem in i (heterotype chromo- 
somes) out of the split loops. 
Two of the gemini show the 
joint between the two premaio- 
tic chromosomes of which each 
is formed. 
