324 



ERNEST CARROLL FAUST. 



and C. reflexae Cort in which the flame cells have not been worked 

 out. The cercaria of Echinostomum revolutum (Froel.) is also a 



I 2 



FIG. i. Cercaria chisolenata Faust, ventral view, showing excretory and 

 digestive systems. X 105. 



FIG. 2. Cercaria complexa nov. spec., ventral view, showing excretory and 

 digestive systems. X 170. 



member of this group but is not entirely typical, for in this 

 species the tertiary portion of the collecting tubule arises as a bi- 

 furcating branch from the mid-region of the secondary portion of 

 the canal. Flame cells occur along both rami of the tertiary 



