HTDATIDS OF THE SHEEP. 



I 1!> 



ing the colony. This hydatid also infests cattle, the horse, 

 goat, various species of antelope and deer, the dromedary, 

 and, it is said, the rabbit. " In the sheep the disease is rec- 

 ognized at first by a heavy, stupid, wandering gait, which 



Fig. 80. .4, brain of a sheep which three- weeks previous had wallowed some egge 

 of T . ccp.niirus. and which was killed after having shown all the symptom* of " stag- 

 gers." B b, isolated gallery formed by the worm at the surface of the brain, (be sco- 

 lex being found at the end of the gallery. Be. vesicle (proscolexl before the birth of 

 the scolex. B d. vesicle in which the* scolices will appear, d, vesicles whirh have 

 produced some scolices. D. the hydatid vesicle containing gcj. the secondary vesicles. 

 E. scolex of T, c<nnrus. corresponding to a secondary vesicle D f?, and very much 

 magnified and invaginated. </. point at which the head of the worm will issue out ; 

 !>. pi lint of junction with the hydatid vesicle ; c, hooks ; d, the suckers ; e, the neck ; 

 /, the wall of the hydatid cyst.' After Beneden. 



is frequently succeeded by irregular, tortuous, whirling 

 movements of the body, accompanied with convulsions (Cob- 

 bold). 



The simplest form in the order is CaryopliyllcBUS, in 

 which the body is not jointed in the adult, though it is so 



