TRANSMISSIBIL1TY OF TINEA TONSURANS. 293 
f epizootic herpes/ as applied to animals, will be abandoned 
in future by Veterinarians, and that of f tinea tonsurans 5 sub¬ 
stituted instead. f Herpes circinatus 5 of the hairy parts is 
‘ tinea tonsurans/ and tinea tonsurans of non-hairy parts is 
tinea circinata. I have been informed by eminent veterinary 
authorities, who have seen the white pony at the Vete¬ 
rinary College, that the disease from which it is suffer¬ 
ing is not like ordinary ringworm in the horse. All I 
can say is, that the disease from which the white pony 
is suffering is well-marked tinea tonsurans in an exten¬ 
sive form. At present sufficient time has not elapsed for 
the fungus to invade the hairs and split them up in any 
abundance; but in some parts the hair is thinning out, and 
I have no doubt baldish places will soon be produced, studded 
over with short broken-off hairs, if the disease be let alone. 
I imagine that under the term f ringworm 5 many very dif¬ 
ferent diseases of the horse—ekzema, simple herpes, &c., are 
mixed up together. I should say that if there be any 
differences in the fungus observed in the case of tinea 
tonsurans in the horse in the present instance, as compared 
with the ordinary appearance of the trichophyton growing 
upon man, they are differences not of kind but of luxuriance. 
There is more mycelium of a very vigorous growth, but only 
such as is seen in Burmese ringworm, where the operation 
of an excessive amount of heat and moisture is favorable to 
the growth of the fungus. The spores, however, are of the 
same size and character, though perhaps more abundant. 
Difference in size goes for nothing, however, as I have long 
ago shown, as a specific distinction among epiphytes. It 
may be supposed that in all likelihood there would be a 
difference in the characters of vegetable parasites found in 
man and in the horse, as is the case with animal parasites. I 
am unable to find any in the present instance, save in regard 
to luxuriance ; and I think the facts which we possess touching 
favus and other parasitic affections in man and animals, 
rather tends to prove that there is an identity as regards the 
characters of these latter diseases and the fungi or epiphytes 
which cause them, whatever may be the case with regard to 
epizoa.” 
Allusion is made to the history of an epizooty of tinea 
tonsurans,or,as it was designated, “epizootic herpes/ 5 which 
occurred a few years since in the valley of Borne, in Savoy, 
as related by the veterinary professor, Papa, who was in¬ 
structed to investigate the circumstances connected with the 
outbreak. A number of instances are recorded in which the 
disease was communicated direct from the horse to man, 
