PARASITOLOGY. 



181 



Description. — The head is some larger than that of 

 the two preceding species and is provided with fonr 

 sucker discs ; the neck is short and thick ; the seg- 

 ments are wider than long. The terminal segments 

 are narrower than the preceding ones, which gives 

 the worm an attenuated appearance. The posterior 

 borders of the segments are fringed both dorsally 

 and ventrally with finger-like projections ; those on 

 the border of the segments close to the head are 

 short but on the lateral segments the fringe covers 

 the succeeding ones. The fully developed worm 



varies from three to six inches in length. 



<\ 



Life History. — The sheep tick 

 is said to be the intermediate 

 host. 



Ani7nals Infested. — Sheep. 



Parts Infested.SmoXl intes- 

 tines. 



Symptoms. —S^hen the animal 

 is infested by many worms they 

 may interfere with digestion 

 and by robbing the host of nu- 

 trients cause an unthrifty con- 

 dition ; they may prove serious 

 to lambs. Many times the 

 worms find their way from the 

 duodenum, through the bile 

 duct to the gall bladder ; they 

 may clog the gall duct and cause serious results. 

 Treatm£nt.S2ime as for the Taenia Expansa. 



¥\s. 69— 



Taenia Fimbriata. 



a, Head. 



b, neck. 



c, Terminal segment* 

 with fimbria. 



