OBSERVATIONS ON PORRIGO OR TINEA, 
395 
other conntries appear to have understood that this was 
likely to be so better than our own, and consequently sent 
distinguished veterinarians to lend their aid in solving some 
of the most urgent questions connected with veterinary sanb 
tary policy. Ought not we to have done the same ? 
OBSERVATIONS ON PORRIGO OR TINEA, 
By A. E. Macgillivray, V.S., Banff, 
(Second Communication.) 
In my previous paper on this subject I remarked that I 
had met with three varieties of porrigo in the lower animals, 
namely, favosa, scutulata, and decalvans . 
The designation “porrigo ” has now become almost 
obsolete, having been superseded by the more appropriate 
one of “tinea;” so that we now find T.favosa, T. scutu¬ 
lata, and T. decalvans, used to specify the three varieties of 
the affections under discussion (vide ‘ Hillier’s Handbook of 
Skin Diseases,’ 1865). 
The second of these, T. scutulata, is by common consent 
called ringworm, and is itself, in the human subject, by some 
authorities subdivided into three distinct varieties, known as 
T. tonsurans, or ringworm of the head; T. circinata, or ring¬ 
worm of the body ; and T. sycosis, or ringworm of the beard 
(vide ‘ McCall Anderson’s Monograph on Parasitic Skin 
Diseases,’ 1868, which author, by the way, styles ringworm 
T. Iricophytind). 
In my former communication I mentioned several instances 
where T. favosa had been produced in the human subject by 
contagious matter from T. scutidata, or ringworm of the 
lower animals, and how common it was for the latter to be 
transmitted from the lower animals to man, and that from 
these facts I considered that the two affections, T. favosa 
and T. scutulata, owed their origin to one and the same 
parasitical fungus. 
I also stated that, after minute and extensive investigations 
in two cases of T. decalvans, respectively in a hare and a dog, 
I considered this variety of tinea also to be caused by the 
ravages of the same parasitical fungus. 
It seems, however, that many eminent dermatologists, 
both British and continental, maintain that the three principal 
varieties of tinea mentioned above are caused by three 
different and well-defined microscopical fungi; and that the 
