LIVER FLUKE. 



FIG. 97. Life history of liver fluke. After Thomas. 



i. Developing embryo in egg-case ; 2. free - swimming ciliated embryo \ 

 3. sporocyst ; 3^. shell of Limneeus truncatulus ; 4. division of sporo- 

 cyst ; 5. sporocyst with rediae forming within it ; 6. redia with more 

 rediae forming within it ; 7. tailed cercaria ; 8. young fluke. 



