ON THE SPERMATOGENESIS OF THE SILK-WORM. 
I 5 I 
the periphery of the nucleus and finally form a compact, deeply 
stainable mass with pointed end and vacuole. This chromatin 
mass gradually elongates and forms a spindle-shaped head of a 
spermatozoon. From the remnants of the “Verbindungsfäden,” 
a “Nebenkern” is formed, which elongates and enters into the 
tail part. A mitosome is also seen, arising from the cytomicro- 
somes. 
End of December, 1893. 
