304 CLINICAL VETERINARY MEDICINE AND SURGERY. 



of the cerebellum, a tumour, the size of a small nut, developed particu- 

 larly in the white substance, from which it was clearly differentiated by 

 its greyish colour and firmer consistence. Its right portion assisted in 

 forming the roof of the fourth ventricle. The growth had not invaded 

 the peduncles of the cerebellum. 



Histologically examined after hardening in chromic acid, this 

 tumour presented in some respects the characters of glioma, but its 

 predominant features were those of embryonic sarcoma. 



TUMOUR OF THE BRAIN IN THE HORSE. 



5. A well-nourished sixteen-year-old cart-horse. 



History. — Had always appeared nervous. Six months before death 

 was seen to carry the head inclined towards the left and the poll 

 towards the right, as though the ear were diseased and the animal 

 dreaded it being touched. When pushed sharply away from near side 

 appeared about to fall, and indeed did sometimes fall. Had formerly 

 been used for ploughing, but was latterly unable to walk steadily in the 

 furrow. Had always been able to back, though latterly had difficulty 

 in controlling hind limbs. Could lie down and rise without assistance. 

 Urine and fasces were passed normally. Appetite good. Walked three 

 miles to slaughterer's yard. 



Autopsy showed brain to be normal except for presence of irregular 

 grey body, about the size of half a walnut, between the cerebellum and 

 medulla on left side. This body was partially blended with plexus 

 choroides of fourth ventricle, was somewhat soft and greasy in consist- 

 ence, and seemed on microscopic examination almost entirely formed 

 of crystals of cholesterin. The cerebellum and medulla were slightly 

 depressed for reception of the mass. 



Messrs. T. and W. Fletcher's case, Journ. Comp. Path, and Therap., 1891, p. 261. 



BRAIN DISEASE— TUMOUR IN NEIGHBOURHOOD OF CEREBELLUM 



AND MEDULLA. 



6. A Light Cavalry horse, seen 2nd August, 1886. No record of 

 any previous brain disease. 



State on Examination. — This animal staggered as if drunk, crossed 

 its legs, its eyes had a vacant stare, the extremities were cold, mucous 

 membranes pale, pulse rather small, 46, respiration and temperature 

 normal. 



Slight improvement during succeeding days. On the loth symptoms 

 returned as before ; the horse fell when picking up some hay from the 

 floor, and was lifted with difficulty. 



On the 14th constant twitching of eyelids and hypersesthesia of 

 limbs ; no improvement followed administration of atropine, which was 

 substituted for strychnine previously given. 



By the 24th the animal had become extremely nervous and fright- 

 ened at the slightest sound ; if startled it would twitch and quiver all 

 over for some minutes, nearly falling in consequence ; the lips and 

 eyelids continued to tremble markedly for a long time afterwards ; if 



