

758 



TEXTBOOK OF ZOOLOGY 



Proboscis (extruded) 



Serve-ganglion 



Esrg, 



YoUcceUs 



.^Intestine 



Ventral sucker. 

 Nephridium 



Germ-cells 



Cercaria 



Germ-cellf 



Fig. 398. — The liver fluke, Fasciola hepatica. A, egg; B, miracidium ; G, sporo- 

 cyst ; D and E. rediae : F, cercaria; G. encysted staa;e ; H. adult (showing dip:es- 

 tive and excretory systems). (From Hegner, College Zoology, published by The 

 Macmillan Company.) 



