PLATE XXV 



A Fully-developed Redia, showing — 

 a. A Young Redia. b. The Mouth, c. The Stomach. 



Represents the Life History of the 



Liver Fluke. 



i. The Fertilized Egg. 2. The Ciliated Em- 

 bryo. 3. The Sporocyst. 4. The Redia. 

 5. The Cercaria. 6. The Encysted Cer- 

 caria(Pupa). 7. The Full-grown Fluke. 



A Portion of Stem of Grass, showing— 



a. The Cysts fixed to the same, each Cyst con- 

 taining the Pupa of the future Liver Fluke 

 ready to be swallowed by Sheep. 



A Cercaria of Liver Fluke, 

 showing — 



a. The Tail, by which it swims. 



b. The Cyst or Envelope. 



A Full-grown Fluke, 

 showing the Diges- 

 tive System, and — 



a. The Mouth. 



An Adult Fluke, show- 

 ing the Repro- 

 ductive Organ as 

 Branches, and — 



a. The Mouth. 



