CHRONIC DISEASE OF THE BONES OF THE CRANIUM. 77 
the walls of the ventricle had caused considerable absorption. 
The septum lucidum had entirely disappeared. 
This is the first instance I have met with of a hydatid in 
the ventricle of the brain of the horse, and I am inclined to 
think that such occurrences are very rare. We are, therefore, 
the more indebted to Mr. Woodger for the trouble he has 
taken in bringing the case under the notice of the profession. 
The records of veterinary medicine contain numerous cases 
of hydatids in the brain of the sheep, and in the April number 
of the Proceedings of the Veterinary Medical Association^ 1839, 
one is recorded by Mr. Battledore, veterinary surgeon, of a 
hydatid being found in the lateral ventricle of the brain of this 
animal, which produced unconsciousness and a constant dis¬ 
position to turn to one side. Hydatids on the surface or in the 
substance of the brain of the sheep are common enough, but 
in the ventricles of the organ such entozoa are, I believe, very 
uncommon, 
[At page 396 of our Journal for 1855 a case is recorded by 
Mr. Morgan, of Dalston, which he has described as one of hy¬ 
datid of the brain of the horse. Subsequently to the publication 
of the case we had an opportunity of examining the spe¬ 
cimen, and found it to be a mere membranous cyst, containing 
a good deal of cholesterin in a state of crystallisation.] 
CHRONIC DISEASE OF THE BONES OF THE 
CRANIUM OF A HORSE, ASSOCIATED WITH 
THE EXISTENCE OF HYDATIDS WITHIN A 
CYST AT THE INFERIOR PART OF THE 
ORBIT. 
By James Kirkman, M.R.C.V.S., Accrington, Lancashire. 
I 
I HAVE forwarded per rail the brain, &c., of a horse, and 
also a small bottle containing some globular-shaped bodies, 
such as I have never seen before. I shall be glad if you 
would examine them and let me have your opinion of their 
nature. 
The subject of the disease was a bay cart-horse, eighteen 
years old, the property of John Hall, Esq., of Haslingden. 
In December, I 86 I, I attended this horse for influenza, from 
which he then seemed to perfectly recover, and worked on 
until July 14th, 1862. At this time the owmer requested 
