40 The Rot in Sheep. 



entozoon to the mucous membrane of the biliary ducts, whereby it 

 is enabled to resist the contraction of the ducts to expel it with 

 the bile into the intestine. Use, no doubt, is also made of this 



Fig. 5. 



Digestive System of the Distoma. Magnified. 



sucker as a fulcral point of attachment when the entozoon is 

 travelling onwards into the smaller branches of the ducts to 

 deposit its ova. Besides such a use, an opinion prevails that 

 the organ is similarly employed in the act of coition between 



