PUS IN THE GUTTURAL POUCHES OF A HORSE. 141 
When neither of these three circumstances occurs, melanosis may 
arise and become developed in a tissue, without its existence being 
denoted by any symptom, or any morbid phenomena, local or general. 
Such is a very brief sketch of M. Andral’s account of melano- 
sis. It is a fair sample of the rest of his work. It is not a book to 
be perused carelessly ; but for serious reading, and especially for 
occasional reference as to the nature and cause and lesions of 
almost every disease with which either the biped or the quadruped 
may be affected, it is invaluable. 
A COLLECTION OF PUS IN THE GUTTURAL 
POUCHES OF A HORSE. 
By M. Reboul M.V. Coursan (Aude). 
On the 7th of July 1833, I was requested to visit a horse that, 
for some time, had a tumour daily increasing in the parotido-laryn- 
geal region. 
Symptoms . — Loss of spirits, debility, loss of condition fearfully 
marked, a dry mouth, accelerated respiration, a hoarse cough, 
pulse full and concentrated, the temperature of the body elevated, 
and the mucous membrane red. The horse preserved his appetite 
both as regarded solid and liquid food, but it Avas with great diffi- 
culty that he swallowed the latter, A little to the left of the larynx 
there was a hard tumour, prominent and tender, and which was con- 
tinued in one direction almost to the middle of the channel, and in 
another almost to the base of the ear — there, and towards the in- 
ferior third portion of the parotid gland, it was softer and less pain- 
ful. The left parotid gland, very little increased in bulk, and not 
very painful to the touch, evidently contained fluid which fluctuated 
under the finger. A foetid odour was exhaled from the mouth. A 
/viscid fluid dropped from the mouth, and in which portions of barley 
were often contained. 
I was easy for me to form an accurate diagnosis from these facts, 
and to prescribe the proper treatment The proprietor readily con- 
formed to my wishes, and requested me to perform the operation 
of hyo-vertebrotomy — the opening of the guttural pouch — and 
which I assured him was the only means by which the evil could 
be arrested. 
Most authors, and among them Hurtrel D’Arboval, say that 
the operation should be performed, the animal being standing. I 
was quite of their opinion, the danger of suffocation being so great ; 
but the appearance and habits of the patient leading me to fear 
VOL. XII. T 
