206 MANUAL OF ELEMENTARY ZOOLOGY 



3 



Fig. 125. — The life-history of a liver fluke. — After Thomas. 



, Developing embryo in egg-case_ ; 2. free-swimming ciliated embryo ; 

 3. sporocyst ; 3a. shell of Limtusus truncatulus ; 4. division of 

 sporocyst; 5. sporocyst with redise forming within it; 6. rediawith 

 more redise forming within it ; 7. tailed cercaria ; 8. young fluke. 



