PLATE 9 



EXPLANATION OF FIGURES 



81 Cross-section of the vas deferens filled with mature spermatozoa. X 295. 



82 to 84 Stages of the growth period showing the two chromatoid bodies in 

 the cytoplasm. 



85 to 87 Metaphase stage, primary spermatocyte division, showing the two 

 chromatoid bodies migrating to one pole. 



88 Anaphase stage, primary spermatocyte, with the two chromatoid bodies 

 at one pole. 



89 Telophase stage, primary spermatocyte, showing the two chromatoid 

 bodies at one pole. 



90 Early second sjiermatocyte stage showing the two chromatoid bodies in 

 the cytoplasm. 



91 Metaphase stage, primary spermatocyte, showing one chromatoid body 

 at each pole. 



92 and 93 Anaphase and telophase stages, primary spermatocyte, with the 

 chromatoid bodies at opposite poles. In figure 93 the nuclear walls have already 

 formed around the chromosomes thereby leaving the chromatoid bodies in the 

 cytoplasm. 



646 



