HYDATIDS OF THE SHEEP. 



16i 



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. \\Q.—A, brain of a sheep which three weeks previons hart ewallowefl some eggs 

 of 7 . comurus. and which was killed after having shown all the symptoms of " stag- 

 gers." B b, isolated gallery formed hy the worm at the Rnrface of the brain, the eco- 

 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. C, vesicles which have 

 produced some ecolices. Z*. the hydatid vesicle containing g'f/, the secondary vesicles. 

 E. scolex of T. cc&nurm. corresponding to a secondary vesicle V 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 ; o, 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 CaryophyllcBus, in 

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



