FASCIOLA HEPATICA. 183 



13. The pupa, thus encysted for many weeks, or even months, 

 attains a higher organization, at last becoming converted into the 

 sexually mature Fasciola hepatica. It gains access to the liver 

 ducts, then passes into the common biliary outlet, and from thence 

 is transferred into the intestinal canal, being finally expelled its 

 vertebrate host in the manner previously described. 



