sv. 



oe 

 eh 



35 



36 



35. Transverse section of worm, to show privation of latf-ral excretory canals to form singlt 



tube opening in a subsequent section at ep, 



36. Diagramnaatic representation of normal body wall of O. gibsoiii, the asymmetry being 



greatly diminished. 



Onxhocerca Girsoxi. 



