114 
THE ORGANIC CELL 
The Prophases oe Mitosis in Primary Spermatocytes of the Salamander. 
(Meves.) 
A. Early segmented spireme, two centrosomes are seen outside the nucleus. 
B. Longitudinal splitting of the spireme ; and appearance of astral rays. 
C. Early amphiaster and central spindle. D. Chromosomes, nuclear mem- 
