PARASITOLOGY. 181 
Description.—The head is some larger than that of 
the two preceding species and is provided with four 
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. 
TS 
Life History —The sheep tick 
is said to be the intermediate 
host. 
Animals Intested.—Sheep. 
Parts Intested.—Small intes- 
tines. 
Symptoms.—When 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 Fig. 69— 
to lambs. Many times the ce anal 
worms find their way from the b, neck. 
duodenum, through the bile |) races Segments 
duct to the gall bladder; they 
may clog the gall duct and cause serious results. 
Treatment.—Same as for the Taenia Expansa. 
