CIIROIvIC DISEASE OF THE BONES OF THE CRANIUH. 79 
of the cranium was raised up, which^ as you will see, has led 
to absorption of a portion of brain. 
If you think this case worthy of inserting in the Veterinarian, 
you would greatly oblige me by forwarding it for publication, 
together with any remarks you may be pleased to make upon it. 
To Professor Varnell. 
KEMATIKS ON THE ABOVE CASE BY PBOEESSOR VARNELL.' 
, The parts sent for my investigation consisted of a portion 
of the cranium and the brain. I first examined the former, 
which I was induced to do from the statement made in Mr. 
Kirkman’s report, that a part of the osseous wall had under¬ 
gone considerable structural alteration. Not only did I find 
this to be really the case, but that portions of the temporal 
and pterygoid muscles, and those of the eye also, were much 
degenerated. These muscles were pale and flabby, but had 
a quantity of adventitious tissue connected with them, which, 
with the thickened state of the pericranium, produced a con¬ 
siderable enlargement externally, the surface of which sug¬ 
gested the idea of its having formed a part of a cyst. Imbedded 
in the loose tissue and the muscles alluded to, I found 
several small, vesicular bodies, identical with those sent by 
Mr. Kirkman, to which I shall again allude. I next examined 
the inner surface of the cranium, the left anterior half of the 
floor of which, from as far back as the posterior part of the 
sella turcica, and as far forward as the olfactory fossa, was 
considerably thickened by osseous deposition. The enlarge¬ 
ment thus produced inwardly must have caused grea't pressure 
upon the anterior half of the left hemisphere of the cerebrum, 
involving not only the base of this part of the brain, but also » 
the following nerves, namely, the first, second, third, fifth, 
and sixth. 
The pressure of this abnormal growth upon the brain had 
caused a corresponding depression in the base of the organ, 
and the nerves above mentioned must, in their course out of 
the cranium, have been also considerably pressed upon, and 
had their functions, no doubt, materially interfered with. 
The symptoms described by Mr. Kirkman doubtless 
depended upon the pressure imparted to the brain and 
nerves by the encroachments of the osseous growth within 
the cranium. 
It may be asked, what was the cause which gradually 
produced this enlargement within the cranium ? This ques¬ 
tion is answered by examining the vesicular bodies sent with 
the other parts, which, we learn, were only a portion of a very 
