OPERATIONS ON THE FOOT 103 
the connective tissue, the skin being removed only with 
difficulty. The tendons were soft and much thickened. A 
rupture of the skin at the coronet, just where the skin 
meets the wall of the foot. Large extravasations of blood 
at the back of the tendons, situated in the lower half. 
ixternal nerve trunk had become reunited, at the point 
of junction there being a hard lump about the size of a 
walnut. Internal nerve trunk also had become reunited, 
and presented a thickened portion at the point of junction, 
but not so large as that of the outer side, and situated in 
the lower half of the tendon, about 2 inches higher than 
that on the external nerve. This nerve trunk was atro- 
phied below the thickening, and had undergone gelatinous 
degeneration. Judging from the scars on the skin, this 
side had evidently been unnerved a week or ten days pre- 
viously to that on the outer side. The band stretching 
across the back of the perforatus, between the external and 
internal nerves, appeared on the inside to have become 
firmly fixed into the tendon. 
‘On removing the hoof, under the sole there appeared a 
large quantity of very fcetid pus; the laminw were very 
much inflamed in patches. There was an enormous thick- 
ening of connective tissues in the heel. On cutting longi- 
tudinally through the perforatus tendon, there was exposed 
a large blood-coloured mass, of a gelatinous appearance, 
situated on the perforatus tendon, the latter being very 
much thickened, and growing to the navicular bone. The 
underneath surface of the superior suspensory ligament 
was much thickened, and firmly adherent to the bone; at 
the posterior -surface of the metacarpus there was a quan- 
tity of gelatinous substance. The anterior ligament of -the 
fetlock-joint was thickened; the navicular bone was entire, 
but showed lesions of navicular disease, being ulcerated. 
Section through the bone did not reveal anything further. It 
may be here remarked that the ulcerations were on either 
side of the central ridge, and not at all on the ridge itself. 
‘Microscopic examination of the tissue joining the two 
ends of the nerve together revealed a few nerve fibres ; the 
