72 THE HORSE. 
the middle ligament, thin and short. These are fixed above to the bases of 
the ossa sesamoidea, and below to the superior extremity of the os sufira- 
ginis near the edge of its articular surface. This ligament is in close 
contact with the synovial membrane. 
fia. 14.—ANTERIOR VIEW OF FETLOCK 
AND PASTERN JOINTS. 
1. 1. 1. Lower row of carpal bones. 
2. Metacarpal bone. 
3. External sesamoid bone. Suffragineal bone. 
4, Suffragineal bone. 
A 
B 
D. Coronal bone. 
5. Coronal bone. E. Lateral cartilages. 
6. Pedal bone. F 
1 
2 
3 
4 
5 
6 
7 
Yra. 15.—PosTERIOR VIEW CF FETLOCK AND 
PASTERN JOINTS. 
. Metacarpal bone. 
. B. Sesamoid bones. 
. Navicular bene. 
7. Tendon of the extensor pedis. . 1. 1. Lower row of carpal bones. 
8. Long ligament which blends inferiorly 
: . 2. Suspensory ligamens. 
with the tendon of the extensor . 3. Bifurcation of same, in order to join the 
sesamoid bones. 
. 4. Inter-sesamoideal fibro-cartilaginous sub- 
stance. 
. Point over which the tendon of the flexor 
pedis perforans plays. 
. Inferior superficial sesamoideal ligament. 
. 7. Middle inferior sesamoideal ligament, under 
which the deep-seated ligament is placed. 
8. 9. 10. Ligament connecting the navicular 
and coronal bones. 
11. Ligament connecting the pedal and navicular 
bones. 
pedis. 
9. Point where the extensor tendon 
begins to expand. 
10 &11. Points to which the extensor 
tendon is attached. 
12, 12. Lateral cartilages. 
The lateral sesamoideal ligaments are formed by two thin plates, which 
extend from the base of each sesamoid bone to the tubercle which exists 
on the superior side of the os corone. On their internal faces they are 
lined with synovial membrane. 
The inter-sesamoideal ligament consists of fibro-cartilaginous substance, 
which runs from the posterior part of one sesamoid bone to that of the 
other, spreading over the external surface of the outer, and internal surface 
of the inner bone. It is composed of the fibro-cartilaginous substance in 
which the ossa sesamoidea were criginally developed. This mass of 
fibrous matter, in common with the posterior and internal faces of the 
two bones, forms the smooth pulley-like groove over which the flexor 
tendons play. 
