104 



PLATYHELMINTHES 



[CH. 



FIG. 44. .Diagram of digestive and excretory system of Distomum hepaticum 

 x about 8. From Leuckart. 



1. Mouth. 2. Pharynx. 3. Reproductive pore. 4. Branch of 



alimentary canal. 5. Branches of excretory system. 6. External 



opening of excretory system. 7. Nerve-ring. 



