574 PROGRESS OF VETERINARY SCIENCE AND ART. 
central eminence having disappeared, and an exostosis formed 
invading all the space occupied by the trochlea; c, the outer 
part of the head of the humerus, also the seat of osseous 
vegetations. The head of the humerus, where it articulates with 
the scapula, healthy; but giving some evidence of synovitis, 
probably the result of having travelled two days from the fields 
where he was grazing, to M. Yilatte’s residence in Paris. 
M. Yilatte was at a loss to explain the total destruction of 
the trochlear prominence. — f Bulletin de la Soc. Imp. et Cent . 
de Med . VUd p. 168, 1854. 
The second case of shoulder-lameness refers to a horse 
destined for the dissecting rooms in the Alfort school, and 
which M. Goubaux observed to be lame, with marks of firing 
over the shoulder, and a difficulty to flex the limb forwards 
and upwards, though the horse bore on it well. The shoulder 
was deformed, though the bones had their normal direction. 
On dissection, the deep-seated lymphatic glands were found 
to be enlarged; the aponeurosis of the pectoralis magnus, 
as it passed over the upper part of the flexor brachii, was 
adherent, and there was a slight ecchymotic spot on it. The 
flexor brachii, which was voluminous, was excavated in its 
centre, there being a membranous cyst in which a heffis egg 
might have been deposited. Within was a reddish serosity, 
and a fibrinous clot, which much resembled in shape the 
cotyledon of a cow. A perfectly identical lesion was dis- 
covered above, near the joint. A third cyst was seen in the 
same muscle, near the external tuberosity of the humerus. A 
fourth existed near the origin of the tendon of the same 
muscle. A fifth in the substance of the internal portion of 
the antea spinatus. The shoulder-joint was healthy, but in 
the trochlea, on which the flexor brachii played, was intense 
synovitis and roughness of the trochlear surface. The 
reflection of the synovial membrane over the tendon, was the 
seat of large red vegetations, and loose in the cavity were red 
flocculi of lymph. The cartilage over the humeral tubercles 
was nearly destroyed, and the surface rough. A careful 
examination of the tendon of the flexor, left no doubt that 
there had primarily been a rupture. The muscle was also 
discoloured in its external half, whilst its internal part was of 
a normal colour and consistence. In the external half, at its 
superior part, were two cysts like the afore-described ; one 
the size of a hazel nut, and the other of a walnut. 
M. Goubaux, referring to Vilatte’s case, says there may 
be differences between the two, in the latter there being 
really inflammation of bone, whilst in his own case the 
lesions principally involved, the flexor brachii, and the 
humerus, were only secondarily affected. He believes such 
