376 THE HORSE, 
The pulio-femoral is situated above the cotyloid ligament, but takes a 
course under the transverse ligament. It arises from the edge of the 
acetabulum, and from the notch in the head of the os femoris, in company 
with the ligamentum teres, and is inserted at the symphysis pubis, where 
it meets its fellow on the opposite side. 
The edge of the acetabulum is deepened by a layer of fibro-cartilage, 
called the cotyloid ligament. This bridges across the notch, and forms a 
complete circle. 
At the notch in the edge of the acetabulum, where the fibres of the 
cotyloid ligament cross one another, and are continued from side to side, 
so as to render the circumference complete, some fibres are added distinct 
from the fibro-cartilage, and being both looser and broader, have been 
named the transverse ligament. 
The inter-articular round ligament, or ligamentum teres, is composed of 
three fasciculi of fibres, forming a thick, dense body, attached by one 
extremity, which is round, to the pit in the head of the os femoris, and 
by the other, which is broad and tvrifid, to the margins of the cotyloid 
notch, where its fibres are blended with the fibro-cartilaginous ring and 
transverse ligament. 
The capsular ligament is attached by one extremity to the margin of 
the acetabulum, and by the other to the edge of the cartilaginous surface 
of the head of the femur. The superior circular edge of this capsule 
is chiefly attached to the bone within four or five lines of the cotyloid 
ligament. 
Fig. 19.—Visw or Hip-Joint. 
1. 1. Lliac portion of os innominatum. 5. Pubio-femoral ligament, 
2. Femur. 6. Transverse ligament. 
3. Head of femur. 7. Ligamentum teres, or round ligament. © 
4. Ischium. 8. Obturator foramen. 
Movements.—The coxo-femoral articulation is one of the joimts which 
enjoys the most extensive and varied movements; namely, flexion, exten- 
sion, abduction, adduction, circumduction, and rotation of the thigh upon 
the pelvis. The mechanism of these diverse movements is most simple. 
STIFLE JOINT, OR COXO-FEMORAL ARTICULATION. 
THE STIFLE JOINT is formed by the union of the inferior extremity of 
the femur, with the superior extremity of the tibia, and the posteriur 
surface vf the patella. 
