420 



THE ANATOMY OF THE HORSE 



THE HIP JOINT 



The coxo-femoral articulation, or hip joint, is formed by the cotyloid 

 cavit}' 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. 



The ligaments of this articulation are the pubio-femoi'al, cotyloid, trans 

 verse, round or ligamentum teres, and capsular. 



The imhio-femoral is situated above the cotyloid ligament, but takes a 

 course under the transverse ligament. It arises from the edge of the 



Fig. 



-Profile View of Left llir Joint. 



1. riia'! portion of os innominatum. 



2. isi-hiuin. 



3. Femur. 



4. Trochanter major extcrnus. 



5. Cotyloid ligament. 

 0. 6. Capsular ligament covering the 

 cotyloid ligament. 



acetabulum, and from the notch in the head of the os femori.s, 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 acelahulum 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 liyament. 



The inter-articular round ligament, or ligamentum teres, is composed of 

 tliree 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 



