98 
The Rot in Sheep. 
represented as exposing the ventral surface — that on the right — 
and the other the back or dorsal surface. , 
Colour. — The colour of the entozoon is found to vary, ac- 
cording to the amount of bile which is contained within its 
digestive system. If well filled with this fluid, the distoma has a 
dark-brown or occasionally a brownish-black hue ; on the con- 
trary, if nearly empty, its colour is a yellowish-brown. Very 
frequently, however, some of its digestive tubes are replete with 
Fig. 3. 
Magnified view of the external surface of the Distoma hepaticum, showing the papillated state 
of the Ekin, with the oral and ventral suckers, &c. 
