746 ANALYSIS OF CONTINENTAL JOURNALS. 
which were a little raised and the centre sensibly depressed 
like a cup. Struck with the singular aspect of this lesion, 
which I had never seen until then, I admitted the cat to the 
hospital, in order to be able to study the disease more easily, 
and I showed it to several physicians of the town, especially 
to Dr. Rollet, ex-surgeon of the Antiquaille, who, after an 
attentive examination, had no hesitation in diagnosing the 
Tinea favosa. 
Once my attention was roused to the subject, I was not 
long in meeting with new cases of this affection. These 
occurred on the 18th October, 1864, the 12th May, 1865, the 
25th January, 1866, and the 8th July, 1866, on young cats; 
and lastly, on the 11th July, 1867, for the first time on a 
young dog. I have therefore had, as will he seen, sufficiently 
frequent opportunities of clinically studying this malady ; 
and, besides, I have resorted to frequent inoculations in order 
to study experimentally this hitherto so little known disease, 
and to determine its relations with the Tinea favosa of 
children. 
These researches, at the same time clinical and experi- 
mental, form the basis of this memoir. 
Characters of the Disease . — The disease in question may 
manifest itself on any part of the body ; the experiments 
which I shall allude to hereafter prove this. Nevertheless, 
in the cat there is a region which it attacks by preference : 
this is the extremity of the feet, the base of the claws. It is 
there I have always met with it in this species of animal, 
with the exception of the first case, in which, as I have 
already said, the crusts were situated near the umbilicus ; 
and another observed quite recently, which will be alluded 
to in detail in the course of our description. 
In the unique case of accidental Tinea favosa that I have 
observed up to the present time in the dog, the disease was 
on the head — at the cranium and the base of the ears. 
When it is of some duration — as is always the case in 
those instances in which our advice is sought — it is charac- 
terised by one or more masses of irregular crusts, more or less 
fissured, of a somewhat pitchy consistency, offering, when 
broken, a fine granular structure, and having a bright yellow 
colour like sulphur. In the cat these crusts generally occupy 
a very limited space, especially when they are seated, as 
they constantly are, at the base of the claws ; they covered a 
wide surface on the head of the dog already spoken of. 
They affect a remarkable disposition ; their contour, some- 
times very circular, at other times more or less notched, 
forms a slight prominence that rises a little above the 
