55(j ENLARGEMENT OF SYNOVIAL CAVITIES IN FORE LIMB. 
(c) Internal—sheath of extensor metacarpi magnus. 
(cl) Oblique—sheath of extensor metacarpi obliquus. 
Those on the anterior surface of the metacarpus and fetlock-joint will 
Fig. 205.—Outer surface of tlie fore limb ; to 
show synovial sheaths. «, Tendon sheath 
of extensor metacarpi magnus ; b, tendon 
sheath of extensor pedis ; c, tendon sheath 
of extensor suffraginis; d, tendon sheath 
of flexor metacarpi extern us ; e e', superior 
and inferior pouches of the synovial mem¬ 
brane of the carpal sheath ; /, f", and 
f", superior, middle, and inferior pouches 
of the synovial membrane of the metacarpo¬ 
phalangeal sheath ; g, bursa beneath the 
extensor pedis tendon ; k, bursa beneath the 
extensor suffraginis tendon ; i, protrusion of 
the synovial capsule of the fetlock-joint. 
Fig. 206.—Inner surface of the fore limb ; to 
show synovial sheaths, a , Tendon sheath 
of the extensor metacarpi obliquus ; b, ten¬ 
don sheath of flexor metacarpi interims ; 
c, _ carpal sheath ; d, d', d", d'", superior, 
middle, and inferior pouches of the meta- 
carpo-phalangeal (great sesamoid) sheath ; 
e, bursa beneath the extensor pedis tendon in 
front of the fetlock ; /, distended synovial 
capsule of the fetlock-joint. 
