70 THE INTERNAL PARASITES OP 



given by Mr. Cox, V.S., whose description of the 

 outbreak amongst lambs in 1855 has already been 

 referred to. 



As sheep and cattle are not flesh-feeders in any 

 legitimate sense of the term, we are almost certain that 

 the cysticerci of the " long tapeworm" cannot, as measles,, 

 be found in the muscles of any vertebrated animal ; and 

 it is therefore almost certain that some of the small 

 molluscs and insects found in water or in damp situations 



Fig. 14. Upper Surface of the Brain, showing an Hydatid. 



constitute the intermediary bearers of the tapeworm 

 larvas in question. 



Of the various cestode larvae which, as such, infest the 

 sheep, by far the most important one is that which gives 

 rise to " gad," "turnside," or " staggers;" and, as 

 already explained, this so-called Coenurus cerebralis, or 

 many-headed hydatid, is the juvenile stage of growth of a 

 tapeworm infesting the dog. Its development will 



