studies M.L.Vol.Y,Pl.Y. 



pra.eoraZ rings '-'■"^'^SIuIhL 



operiMre of cesopJiagas 



iruter Up, 



outer Up. 

 jiephrlduim/^ 



TvepTiridium/^ 



dooUr cavi^. 



rupAriduim.^ 



nepkridiuTn/^ 



testis. 



TLep}iridUuMZ/ ^ 

 fvtsiuUa- seminaZisJ 



glcuuiuZar ttioss surrounding 

 the ptnis. 



(vn,aZ> ring 



vas deferens, 

 penis 



Fi^. IS. 



5 F-Harmer Sel. 



r Hutk, LitV Edin^ 



