CANINE PATHOLOGY. 
197 
greatly relieved, and went running about as lively as possible. 
The difficulty passed away and the animal is now regular in all 
his habits. 
A Case of Tinea Favosa. 
A diminutive black and tan puppy was brought to the hospital 
one evening, presenting a very peculiar, ludicrous appearance. 
The whole body and especially the head was covered with bare 
spots varying from the size of a pea to a penny. 
The gentleman who owned her said that these spots had 
appeared a week before, and she had gradually become worse; 
her mother and the rest of the litter were perfectly healthy ^ 
A little kitten had slept and played with the puppy since she was 
removed from her mother, and as the kitten was constantly 
trying to nurse her, it was thought that this produced the bare 
places, and so they were separated. The kitten was apparently 
health} 7 , and showed no signs of similar spots. 
The bare spots when examined showed more or less redness 
and superficial inflammation in those just developing, followed by 
the appearance of several small pin-head-sized pale yellow crusts, 
seated about the hair follicles; others more advanced showed 
little cups (favus cups) circumscribed, circular in shape and pos¬ 
sessing a marked umbilication in their centres, presenting a true 
honeycomb appearance. The cups latest developed were made 
up of a series of concentric, compactly arranged rings; their 
consistence was firm, but friable to pressure, crumbling between 
the fingers; a peculiar odor was manifest, like that of mice or 
stale straw. 
Desiring to confirm the diagnosis by microscopical examina¬ 
tion, the gentleman kindly consented to leave the puppy with us 
for a few days. 
A small fragment of the crust was detached and placed under 
the microscope and the following condition was observed: 
The crust was made up entirely of fungus, composed of a 
porous mass and possessed of a pale watery color. Each crust 
was enveloped in a capsule or stroma, formed of a finely granular 
amorphous material. The growth consisted of both mycelium 
