DISEASES. 703 



those the furuncle of the frog. We believe it useless, at present, 

 to enter upon a general consideration of quittor, and will pro- 

 ceed to examine the pathological phenomena presented by each 

 variety. 



A. Cutaneous Quittok. — This is a simple furuncle of the 

 coronary region of the foot, in that part of the dermis nearest to 

 the coronary band, having, however, a special character on account 

 of the extraordinary thickness and inelasticity of the dermis of 

 the region it occupies, the result being a kind of strangulation of 

 the inflamed tissue beneath, and a very painful compression. It 

 is through error that some authors have designated by the same 

 name, the furuncle of the canon, of the fetlock, and of the co- 

 ronet. 



The hind feet are more subject to it than the fore, and it is 

 more frequent at the heels, at the flexure of the fetlock, though it 

 is also observed on the sides and front of the coronet, in which 

 case it is much more painful. Cutaneous quittor has also been 

 observed in bovines, where, however, as we shall see as we pro- 

 ceed, it is generally complicated with the tendinous variety, and 

 becomes a true felon. 



I. Symptotns. — Cutaneous quittor is characterized by an in- 

 flammatory tumor or swelling, warm, painful, and tense, of the 

 coronary region of the foot, the color of the skin being but little 

 changed, if it is dark, but if the skin is Hght then the redness 

 is well marked. This swelling is accompanied with a diffused 

 sedema, extending to the fetlock, or even to the hock. We often 

 find angeioleucites, or rather what we call leucophlegmasise. The 

 lameness is generally extreme, and the animal frequently can 

 scarcely rest on the diseased leg. The j)ain is sometimes so great 

 as to induce general fever and loss of appetite, and the animal 

 becomes dull and depressed. After acquiring certain dimensions, 

 the tumor shows a tendency to soften at its summit, its base, 

 however, remaining hard for a considerable time. Rising more 

 and more, it soon ulcerates at a point from which flows a small 

 quantity of bloody pus, followed by the appearance of the slough, 

 {bourbillon). An abscess is now formed in the tumor, which, as 

 it opens, carries with it a portion of the skin, sometimes limited, 

 at others measuring from four to ten centimeters, and there is a 

 slough formed of the subcutaneous cellular tissue which separates 

 by the suppuration with the portion of dead skin. This comes 



