

%.. 



FiGLTRE 14. Antagonistic etirect ot one tungus, P$. ■zmsatum (in center), 

 upon another, T. Ugnarttm. From Gofdaniich et al. C333). 



FiGLTiE 15. Attack of an antagonstic i 

 fundus, F. sambiicinttm (in center). Frc 



•w, upon anodier 

 (333)- 



