THE NERVOUS SYSTEM. 207 



He soon afterwards died. In encephalitis but little can 

 be done beyond cold applications to the head, enemata 

 and laxatives, and the administration of aconite or prussic 

 acid in small doses frequently repeated. In chronic cases, 

 such as the two above referred to, counter-irritation by 

 setons, blisters, &c, may be resorted to, and the bromide 

 of potassium given internally. 



Hydrocephalus, dropsy of the meninges or of the ven- 

 tricles of the brain, seems to be invariably congenital, and 

 especially found in high-bred artificial varieties, such as 

 French poodles and toy terriers. In a case given in detail 

 in the ' Veterinary Record,' vol. iii, the animal was three 

 months old ; he lay on his side and made frequent ineffec- 

 tual attempts to rise ; in doing so he struck his head 

 against the ground. Placed on his feet he ran with his 

 head down, crossing his legs, reeling to and fro, and at 

 last fell. His appetite was ravenous, and on anything 

 being put in his mouth he would grind his teeth most 

 painfully. His special senses were unaffected. If he 

 attempted to look up his eyes rolled upwards. He was 

 destroyed, as all such patients should be. Somnolence, 

 lethargic movements, and a want of vigour are found in 

 these cases, and generally paralysis precedes their early 

 death. 



Parasites have been found in the cranium of the dog, 

 but they are rare. They give rise to the symptoms of 

 increasing compression, such as inclination to walk in a 

 circle, gradual loss of sight, dulness, and want of vigour. 

 The parasite is the gid hydatid {Gsewwrus cerebralis), that 

 which is found so often in the sheep. 



The spinal cord of the dog is disordered in very many 

 cases, and in certain blood diseases, such as rabies, dis- 

 temper, and rheumatism, it is specially liable to derange- 

 ment. Paralysis, either general or local, is in the t dog 

 more frequently a sequela or concomitant of these diseases 

 than due to other causes, and it generally when local 

 assumes the form of paraplegia, although hemiplegia also 

 is seen more frequently than in the horse or ox. Not 

 only is paralysis from direct derangement of the cord 



