EXPLANATION OF PLATE XXV. 



Fig. I. — Cercariae Indicae xxx ; the whole animal, ventral view. 

 ,, 2. — Cercariae Indicae xxx; the body enlarged, ventral view 



hollow. 

 ,, 3.— Cercariae Indicae xxx; the hollow boring spines capping 

 each mucin duct. 



EXPLANATION OF LETTERING. 



ac =- intestine : bs = boring spines : cgs = coarsely granular cephalic-gland 

 cells: cgs' =. finely granular cephalic-gland cells: /= flame cells :/' :^ flagellae 

 working in the main excretory tubes * -. g^ gonad (ovary) : Jig. = head-gland : mgc 

 = mucin gland canals : ps = posterior sucker. 



* These are shown much larger than is actually the case for purposes of 

 clearness. They are actually much smaller than the flame cells. 



