CLONORCHIS 



2 7 



carriers were Pseudorasbora parva and Leucoyobia, and 

 others to a smaller extent (Giinthere). The encysted 

 distoma are found in the flesh of these fish, and when 

 this is swallowed the flukes become mature in kittens in 

 three weeks or more. 



FlG. 13. Opisthorchis noverca. 

 61 i. (After Leuckart.) 



FlG. 14. Clonorchis sinensis, 

 Cobb, seen from the ventral sur- 

 face ; extended. (After Leuckart.) 



Many persons who harbour this parasite appear to be 

 in good health, and when death occurs* it is usually from 

 some cause unconnected with the parasite. Even in 

 these cases there is a considerable amount of biliary 

 cirrhosis caused by this parasite, and the bile-ducts in 



