98 
A. ZUJSTDEL. 
of the -laminae will be found. The suppuration which there 
exudes varies, being in rare instances blackish, as it is usually 
found in traumatic injuries of the hoof; or, again, it is white and 
unctuous, with the odor of decaying cheese ; while more commonly 
it consists of a bloody or greyish matter, mixed with pus. 
If the mortified portion is not deeply seated, so that the slough 
can take place readily, the quittor is quite simple, since as soon 
as it has dropped off there is a well marked improvement. The 
pain then ceases almost instantaneously, and the wound at once 
progresses towards cicatrization. But it is not rare, even when 
the mortification is somewhat superficial, to find the sub-ungueal 
suppuration extending so that the matter runs under the hoof, 
producing at times a more or less serious fistula, or a separation 
of the sensitive and insensitive laminae. Girard says it has been 
seen to extend down to the sole, and to separate it from the 
velvety tissue. The deep sub-horny quittor may be complicated, 
forward, with necrosis of the tendon of the extensor muscle; with 
the inflammation of the joint with caries of the os pedis, and 
even to assume the cartilaginous form of the disease by its ex¬ 
tension to the cartilages of the foot. 
After the recovery of the sub-horny quittor, if the coronary 
band has been mortified in its entire depth, the foot may present 
permanent longitudinal fissures, or seams, or transversal grooves, 
presenting evidences of the existence of a cicatrical tissue when 
the quittor was in progress. 
II. — Prognosis .—The gravity of this quittor depends upon 
the depth of the disease. When superficial and affecting only 
the surface of the tissue, it is easy to cure, but if deeply seated 
it is more serious, on account of the possibility of complications. 
III. — Etiology .—Bruises and violent blows are the ordinary 
causes of sub-horny quittor. It is commonly due to overreaching, 
or to the wounds occurring when animals are wearing long 
caulks, as*in winter. The irritating effects of frozen mud has 
also been admitted as a cause. 
IV. — Treatment .—The superficial, quittor requires a simple 
treatment. Emollient baths and maturating poultices are then 
indicated. It is a good plan to thin the wall with the rasp or 
