OUR DOMESTICATED ANIMALS. 



71 



engage our attention when describing the canine entozoa; 

 but meanwhile, in addition to data already advanced 

 when speaking of the " sturdy " as it exists in cattle, I 

 have to remark that this larval entozoon usually occurs 

 singly in the brain of its host. That several of these 

 parasites occasionally gain access to one animal is a 

 matter of professional observation; nor need the fact 

 excite any particular remark, except in so far as it dis- 

 turbs the commonly-received opinion as'to^the usual seat 



Fig. 15. Base of the Brain, displaying four Hydatids. 



of the entozoon at the upper part of the brain. Ordi- 

 narily the parasite attacks yearlings, but it is an error to 

 suppose that animals of three years old and upwards are 

 incapable of taking the disease. 



As to the symptoms of "gid," it is unnecessary to 

 repeat them. 



When, after death, the skull of a sturdied sheep is laid 

 open (the brain at the same time being carefully re- 



