BURATIfc. 
?l4 
usually a cicatrix, which may have resulted from the healing 
of a simple wound or from a previous bursatic ulcer. The 
elevation would seem to be due to a deposit of adven¬ 
titious material under the skin, which is more or less oval 
in shape. The swelling or tumour is somewhat hot and 
tender. Its production may be followed; by a period 
of quiescence for a greater or less length of time, depend¬ 
ing generally upon certain conditions, local and constitu¬ 
tional. Ulceration starts in the shape of a central abrasion or 
crack which increases in size, and soon passes into an open sore, 
producing a loss of substance. The ulceration generally begins 
at the upper portion of the enlargement, and as a rule it ex¬ 
tends more rapidly in a downward direction over that part of 
the tumour which is constantly kept wet with the discharge. 
It often happens that while the lower part of the tumour 
is in an ulcerative state, the upper portion is found to he 
healing. The sore exudes a sanious fluid, which drying 
on the surface, and mixed more or less with dirt and 
hair, forms an imperfect scab. On removing this crust, the 
exposed surface presents a pale appearance, and the flabby 
granulations bleed readily on being touched. The edges of 
the ulcer are undermined and livid, and around its margin 
various attempts at repair may be seen to be going on. There 
are frequently other, but smaller nodular formations around 
the principal one at various distances, the intermediate skin 
being apparently healthy. These also ulcerate at the same 
time with the parent tumour, and, coalescing, form a large 
and extensive sore. When the tumours form under the true 
skin, the ulceration starts in the shape of a central abrasion, 
which running on removes the skin until it reaches the 
circumferent boundary of the tumour. When, however, the 
deposit occurs under a cicatrix, the ulceration does not 
behave precisely in the same manner, for on its becoming 
irritable, the central part will crack, and be followed by the 
oozing of a grumous fluid. The cicatrix remains in contact, 
and [gradually loses its original appearance by becoming a 
scab, which remains in position until it falls or is rubbed off 
by the horse. The tubercles when occurring under cicatrices 
are larger, and seem more inclined to remain scabbed. 
(c) The phagedaenic bursatic ulcer may be looked upon as 
“ bursatie 55 par excellence . The depositions in the phage- 
daenic form of the disease correspond in every particular to 
those seen in the medium ulcer, with the exception of being 
larger, of more frequent occurence, and differing in their 
after course. In the earlier stage they appear as flat, hard 
tumours under, and adhering to, the skin. They are also 
