31 8 THOMAS H. MONTGOMERY, JR. 



PLATE II. 



FIGS. 18-21. Later stages of spermiogenesis from seminal vesicle. In Fig. 20 

 only the cytoplasmic lobe and the proximal portion of the head are shown. 

 FIG. 22. Spermatozoon from vas deferens. 

 FIGS. 23, 24. Spermatozoa from oviduct. 



