POLYCLAD FLATWORMS — ^HYMAN 



75 





-18 



Figure 4. — Euplana gigas, sagittal view of male copulatory apparatus; b, same, of female 

 copulatory apparatus; c, copulatory apparatus of Paraplanocera oligoglena, as seen from 

 above in cleared specimen, ventral view, showing teeth in the cirrus sac. (For explana- 

 tion see page 66.) 



