PARASITOLOGY. 



161 



FASCIOLIDAE. 



The family Fasciolidae belongs to the order 

 Trematoda and includes the genus Distoma. 



THE FLUKES. 



(Dis — twice) 

 Distoma Hepaticum (Stoma— mouth; 

 (Hepatic— liver) 



Syno)iyms. — ¥^^Q\o\2i Hepaticum. Liver Fluke. 



Distribution.— YoMXi^ in the low-lying lands of the 

 United States where the weather is warm and con- 

 ditions are favorable for the development of the lar- 

 val state. Also found in the low-lying land of Scot- 

 land and other countries. 



Description— The body is flat and leaf-like; it is 

 oblong, larger and rounder in front; at the extreme 

 anterior end it is abruptly contracted in such a way 

 as to present a conical neck; it terminates ob- 

 tusely behind. The antero-posterior diameter is 

 about one to one and one-fourth inches ; the width 

 measures one-third to one-half inch. It is provided 



