OBSERVATIONS ON PORRIGO OR TINEA. 
399 
variety in the position) of the mycelia or filamentous mass 
in which the spores are usually imbedded ; or finally, mayhap, 
some dissimilarity in the quantity and character of the spo- 
roplrorous tubes (query, how much of all this is due to the 
various manipulations and soakings in dilute liquor potassse, 
&c., during our investigations ?) The characteristic com¬ 
ponent parts of the typical fungus are found alike in every 
variety of the affection, at least I have found it so. 
Second, by the contagious material of one variety of tinea 
producing, under other circumstances, or in a different nidus, 
another variety of tinea: such as T. scutulata in the ox 
producing favus in the human subject, in the cat, and in the 
rabbit. I have already adduced examples of this, and will 
now refer to the opinions of Dr. Tilbury Fox and Mr. 
Hutchinson on the subject. 
There is, in the human subject, a peculiar variety of this 
disease named T. versicolor , which is said to owe its origin to 
the fungus called Microsporon furfur , but Mr. Hutchinson 
(vide 13th volume f Pathological Transactions’) has several 
times seen this T. versicolor produced by contagious matter 
from a case of T. tonsurans , which latter is itself, as already 
mentioned, a subvariety of T. scutulata and‘the product of 
the Tricophyton fungus. Mr. Hutchinson by actual experi¬ 
ment verified his observations, thus producing the Tricophyton 
from the Microsporon furfur . 
Dr. Tilbury Fox mentions, in the second edition of his 
tf Manual of Skin Diseases,’ p. 349, that he has found T . 
versicolor to follow the implantation of the spores of the 
Oidium albicans which is the fungus found in thrush or 
aphtha. I consider it worthy of notice that this Oidium 
albicans is the fungus supposed to be present in (e foot-and- 
mouth” disease (see Mr. Fleming’s paper on the subject in 
the Veterinarian for December, 1869). 
A good few microscopists of unquestionable ability main¬ 
tain that not only are the parasites of all the varieties of tinea 
identical, but that they are also one and the same as the 
Aspergillus glaucus {vide Dr. John Towe’s observations and 
experiments in the fifth volume of the e Transactions of the 
Botanical Society’). Now this A. glaucus is neither more nor 
less than a fungus which is often found in diseased oats, 
generally causing an immense amount of mischief. A good 
representation of this fungus will be seen in the Vetermarian 
for March, 1870, being magnified 200 diameters ; and I feel 
certain that any one who has (personally) closely examined 
the arrangement and component parts of the tinea parasite 
will at once allow that the resemblance between it and the 
