316 KANSAS UNIVERSITY SCIENCE BULLETIN. 



ZOOLOGICAL LABORATORY. 



similarities, since we have no evidence as to the fate of the 

 polar granules in the developing spermatid. I am inclined to 

 believe that the bodies observed in figure 33 are the persisting 

 polar granules, but whether these undergo further dissolution 

 or unite to form the middle piece of the mature spermatid 

 must be left for decision by future investigations. 



