LIVER FLUKE. 187 
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Fic. 97.—Life history of liver fluke.—After Thomas. 
x. Developing embryo in egg-case; 2. free-swimming -ciliated embryo; 
3. sporocyst; 3a. shell of Lismaaus truncatulus; 4. division of sporo- 
cyst; §. sporocyst with redie forming within it; 6. redia with more 
rediz forming within it; 7. tailed cercaria; 8. young fluke. 
