CASE OF MELANOSIS. 
71 
hering to the fibres of the longissimus dorsi muscle. On 
cutting through the spinal chord at this place, the melanotic 
matter was found to have extended into the foramina of the 
vertebrae, which I make no doubt was the cause of the paralysis, 
and also of the animal’s walking on one side. The tumour 
taken from the inside of the thigh and adjacent parts, weighed 
upwards of thirty pounds, thus making in all fifty-seven 
pounds, of melanotic deposit. Several of the tumours had 
some attachment with the peritoneum, and I observed here 
and there some large vessels leading from the one to the 
other, a thing I never remember to have seen before. 
[A similar case to the preceding has just occurred in 
the College Infirmary, the particulars of which have been 
communicated to us by Assistant-Professor Varnell. 
In the year 1845, Professor Spooner removed from the outer 
and inferior part of each parotid gland, of a grey mare, an 
ovoid tumour, about the size of a cricket-ball, andwhich proved 
to be of a melanotic character. The wounds healed readily, 
and without any unfavorable symptoms. The mare was early 
removed from the Infirmary, and remained in the possession 
of her owner up to the time of her readmission, at the 
beginning of this year. 
During this interval numerous tumours made their appear- 
ance on the surface of the body generally ; and although the 
mare was in fair condition, and apparently free from suffering, 
the owner, taking into consideration the nature of the disease, 
and the age of the animal, determined on having her destroyed, 
and the body given to the College for dissection. The post- 
mortem examination showed that both the parotid glands, 
were again much enlarged, and studded throughout with 
melanotic matter, which had increased at the expense of 
their glandular structure. The submaxillary and sublingual 
glands w T ere also in a similar state. 
Large melanotic deposits were found in the thoracic 
cavity, involving the bronchial lymphatic glands in particular. 
In the abdomen the mesenteric glands, renal capsules, pos- 
terior aorta, spleen, omenta, and the coats of the intestines 
were implicated. The pelvic cavity also had large tumours 
of the same kind attached to its general surface in which the 
viscera were embedded. 
The liver was of its usual size, and smooth upon its surface, 
but of a remarkably black colour, as seen through its capsule. 
When cut into, the melanotic matter was found to be diffused 
throughout its entire structure, imparting everywhere to the 
fingers and the scalpel a deep black dye. The subcutaneous 
