=Ox.=—There are two joints, one for each digit. The two capsules
communicate posteriorly. The two interdigital lateral ligaments
(Ligamenta collateralia interdigitalia) result from the bifurcation of a
band which arises in the furrow between the divisions of the distal end
of the large metacarpal bone; they spread out and end on the proximal
ends of the first phalanges. A strong =superior interdigital ligament=
(Ligamentum interdigitale), consisting of short intercrossing fibers,
unites the middles of the interdigital surfaces of the first phalanges.
Crucial ligaments (Ligamenta phalango-sesamoideæ) connect the sesamoids
with the proximal end of the opposite first phalanx.
The intersesamoid ligament connects all four sesamoids, and extends
upward much less than in the horse.
The lateral sesamoidean ligaments end almost entirely on the first
phalanges.
The superficial inferior sesamoidean ligament is absent. The middle
inferior sesamoidean ligaments of each digit are two short strong bands
which extend from the distal margins of the sesamoids to the proximal
ends of the first phalanges. The deep inferior sesamoidean ligaments are
strong and distinctly crucial.
[Illustration: