HIP JOINT. 375 
Each is partly covered posteriorly by the lateral cartilage in which it 
becomes lost, while the anterior edge is continuous with the tendon of 
the extensor pedis. Zhe posterior lateral ligament on each side com- 
mences above from the lower fibres of the lateral ligament of the pastern 
‘joint, and from the sides of the lower end of the os coronz. It descends 
obliquely backwards, and is inserted in the retrossal process of the pedal 
bone, and in the upper edge of the lateral cartilage. 
2. Between the os naviculare and the os pedis is a very short but strong 
band of fibres in the nature of an interosseous ligament. It arises from 
the groove on the lower and fore edge of the os naviculare, and passes 
forward to be attached to the back part of the plantar surface of the pedal 
bone. 
3. Two lateral ligaments, one on each side, attach the os naviculare to 
the sides of the coronal bone. 
THE SYNOVIAL MEMBRANE is inserted around the margins of the cartila- 
ginous articular surfaces of the os corone, os pedis, and os naviculare ; in 
front it is attached to the tendon of the extensor pedis, at the posterior 
part of the os naviculare, and between this surface and the tendon of the 
flexor pedis perforans another capsule occurs. 
THE MOVEMENTS of the coffin joint are similar to those of the fetlock 
and pastern, with the addition of a very limited gliding motion enjoyed 
between the os naviculare and os pedis. 
THE HIP JOINT. 
THE COXO-FEMORAL ARTICULATION, OR HIP JOINT, is formed by the 
cotyloid cavity of the os innominatum receiving the globular head of 
the femur. The articular surfaces of each are clothed with cartilage, 
excepting at the notch in the former, and a rough surface on the internal 
side of the latter, to which the round ligament is attached. 
“ ] 
Pia. lo. —Proviteé Vitw oF Lerr Hip Joint. 
1. Iliac portion of os innominatum. 5. Cotyloid ligament. b 
2. Ischium, 6. 6. Capsular ligament covering the 
3. Femur. cotyloid ligament. 
4. Trochanter major externus. 
Tur LicaMENts of this articulation are the pubio-femoral, cotyloid, 
transverse, round or ligamentum teres, and capsular. 
