4U6 DISEASES OF THE SPINE AND ITS COVERINGS. 



exacerbations are brought on ; and whether on the road or 

 in the stable, the affected animal becomes excited, raises its 

 head, dashes forward blindly, and is seized with severe 

 trembling. The head and ears are hot, pulse full and bound- 

 ing, vision imperfect, and appetite suspended. With time 

 the paroxysm is relieved, and the animal resumes its usual 

 look of health. The disease is of course incurable, and is 

 only aggravated by the methods of treatment commonly ap- 

 plied when the fits come on. Bleeding is especially inju- 

 rious, and rather seems to favour a speedy fatal termination 

 to the case. 



HYDATID DISEASE. 



Two cystic parasites are met with in the cranial cavity 

 of the domestic quadrupeds. Cattle and sheep suffer from 

 ccenurus cerebralis, a hydatid which develops in any part 

 of the brain, and concerning which much has been said 

 under the head Enzootic Disorders. 



The second hydatid is the very common echinococcus, 

 seen specially in oxen, and developed either in the meninges 

 or in the substance of the brain. This hydatid, like the 

 ccenurus, is due to the animals picking up with their food 

 the ova of one of the tapeworms which infest the dogs' 

 intestine. 



DISEASES OF THE SPINE AND ITS COVERINGS. 

 PARALYSIS. 



Loss of motor power and loss of sensibility may occur 

 separately or together, and depend on functional or struc- 

 tural disorder of the nerves, or the centres with which they 

 are connected. In brain disease we often have paralytic 

 symptoms, but the spinal affections I have yet to describe 



