EMBOLISM OF ILIAC ARTERIES. 
185 
met that gentleman in consultation. On this occasion the 
mare, as seen in the box, evinced no symptom of disease'; 
trotting exertion, however, quickly elicited the phenomena I 
have noticed. At first Mr. Marriott entertained the opinion 
that the mare was suffering from a spinal affection; hut 
w r hen we had demonstrated to him the condition of the arte- 
ries of the extremities he at once gave acquiescence to our 
diagnosis, and remarked that the case was both singular and 
important, and that he had not previously seen an animal so 
affected. 
The next day, the 3rd, the mare returned to Kinoulton, 
where she was in the care of Mr. Marriott. I saw her with 
my father several times at intervals of three weeks, and on 
each occasion no sensible change had taken place in the 
obstructed vessels ; but on the last visit I noticed the super- 
addition of lameness of the near fore leg. 
As regards the nature of the obstruction in the arteries, 
it is highly probable that it consists of fibrinous coagula, 
the result of inflammation, of a strumous character, of the 
serous membrane of the vessels. This assumption I rest 
upon the facts elicited by the post-mortem examination made 
by my father of two similar cases ; the external iliac artery 
and its branches in the one, and the humeral and its branches 
in the other being plugged with a firm fibrinous deposit, 
separable from the sides of the vessels, non-organised, and 
perforated by a tenuous canal. In this instance, however, 
the embol may be of a totally different nature ; for we know 
that the arteries of the horse are subject to a disease termed 
atheroma ; a coecoplastic matter being occasionally found on 
their serous membrane, and this matter being not unfre- 
quently absorbed and replaced by a calcareous deposit. A 
few years ago my father sent to the Veterinarian the parti- 
culars of a case of cancer of the lungs and atheroma of the 
left ventricle of the heart, and of the large arteries, and I 
think that is the first case of its kind recorded in the annals 
of English veterinary science. In it the serous membrane 
of the left ventricle and of the large arteries was rigid from 
the presence of calcareous matter. 
Now, if in this case I am describing the iliac arteries 
were lined and made rigid by a calcareous deposit, I should 
expect, in addition to the absence of pulsation in them, a dis- 
tinct vibration, and I should also expect from pressure to 
crush the walls of the vessels ; but there was no vibration 
in them, nor was I able to crush their walls by pressure with 
the fingers. 
The intermittent lameness of a paralytic character was a 
