HYDATIDS OF THE SHEEP. 



119 



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. A, brain of a sheep which three weeks previous had swallowed some oggs 

 of T . cmniirus. and which was killed after bavins* shown all the symptoms of " stag- 

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

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

 the scolex. B d. vesicle in which the scolices will appear. C. vesicles which have 

 produced some scolices. D, the hydatid vesicle containing grj, the secondary vesicles. 

 E, scolex of T. ccenurus. corresponding to a secondary Vesicle D g, and very much- 

 magnified and invaginated. a, point at which the head of the worm will issue out ; 

 b. point 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 Caryop'hyllceus, in. 

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



