214 1'^'''^ Management and Diseases of the Dog. 



fine granular structure, and having a bright yellow colour- 

 like sulphur. They affect a remarkable disposition ; their 

 contour, sometimes very circular, at other times more or 

 less iiotched, forms a slight prominence that rises a little 

 above the surrounding skin ; their centre is, on the con- 

 trary, to a greater or less degree concave : the conforma- 

 tion that gives the crust the aspect of a cup. 



" These capsules, or favi, are more or less numerous, and 

 more or less extensive. At the free surface of the crusts 

 there are often found dry, bristly hairs that appear to pass 

 through the entire thickness of the favus mass, and are 

 easily pulled out. At a later period, these hairs are shed 

 from the follicles — not broken off, or sharply cut away 

 close to the crusts, as in Tinea tonsurans. 



" If the crusts are carefully removed, the skin beneath is 

 observed to be thin and depressed, and looking as if atro- 

 phied by compression ; but smooth, not ulcerated, and 

 either quite dry and moist from serous exudation ; sometimes 

 it is pale and anaemic ; but more frequently red, irritated, 

 and sufficiently transparent to show some very fine blood- 

 vessels. Around the margin of the crust the skin is sensibly 

 inflamed, red, thickened, and rises into a somewhat salient 

 prominence. In the dog there is much pruritis : a symptom 

 which is rarely noticeable in the cat ; otherwise, it does not 

 appear to exercise any prejudicial effect on the general 

 health. 



" Another form is that in which the plant is found in 

 depressions on the surface of the skin, forming the yellow 

 honeycomb -like masses which gave the name ' favus ' to 

 the disease, and which, from their being frequently buckler- 

 shaped, suggested the term 'scutulata.' A cuticular 

 elevation is seen, beneath which is a small favus. Generally 

 there is no pus or fluid of any kind ; the fungus grows, and 

 the cuticle above it, supposing it to have become forcibly 

 detached, finally separates, leaving the favus exposed."* 



* Fleming's " Veterinary Sanitary Science," vol. ii. pp. 474, 475. 



