NO. 17 



POLYCLAD WORMS HYMAN 



13 



Figs. 12-15. 

 12, Semidiagrammatic sagittal view of the copulatory complex of Euplana 

 clippcrtoni, based on sagittal serial sections of the sexual region of the holotype ; 

 13, Eyes of Prosthwstomum parvicclis, holotype; 14, Prosthwstomum parvicehs, 

 holotype; 15, Everted male copulatory organ of Prosthwstomum parvtcelts 

 containing the male apparatus. 



