Fig. 6. The head of a spermatid in a slightly more advanced stage 

 of development than that depicted in Fig. 5. The cap consists of a 

 homogeneous layer of moderate density bounded by outer and inner 

 membranes which are continuous at the posterior margin of the cap (*). 

 A layer of osmiophilic granular material is visible on the inner aspect of 

 the nuclear membrane where it is in contact with the cap. A cross- 

 section of a tail flagellum (T) is seen at the lower right of the figure. 

 Fig. 7. A late spermatid showing the coarse granular character of its 

 nucleus. The head cap (C) is visible, covering the anterior two-thirds of 

 the head. The post-nuclear cap (Pn C) appears as a clear space within 

 the nuclear membrane at the base of the nucleus. Tail filaments (T) and 

 ring centriole (Ri C) are also included in the section. 



