blackman: the spermatogenesis of scolopendra. L2«3 



In the process of elongation the nucleus first "becomes dart-shaped ; 

 later it lengthens out into a very slender filament, which has upon its 

 periphery a spiral ridge of chromatin. 



The mature spermatozoa derived from the large spermatids reach a 

 length of nearly one millimetre, the head and acrosome being 260 micra 

 long. 



Zoological Laboratory, Harvard University, 

 April 12, 1905. 



