388 



THE ANATOMY OF THE HORSE 



lower extremity. The anterior angle is the shin, and at the upper part of 

 this is a strong tubercle (3, Fig. 35). 



The superior extremity has two irrogiilarly oval and slightly hollowed 

 articulatory surfaces, which revolve upon the condyles of the femur, the 

 cavity being deepened in each by the intervention of the semilunar cartilage. 

 Between them are to be seen a sharp elevation and two pits to which the 



Fig. "5.— Tibia, Fibula, and Tarsus. 



A. Tibia. 



1. 2. Articiilatorv snrfacfis. 



3. Tuberosity. 



4. Spine. 



5. External niallenlim. 



C. Surfaces articulating with astraj^alns 



B. Fibula. 



C. Or calcis. 



7. Point of hock. 



I). Astragalus. 



E. Cs scapUoides. 



F. O.S cuneiforme innfiiiuic 



0. Os cuboidcs. 



II. Os cuneiforme p.Trvum. 



1. Upjier pnrt of large metatarsal bone. 



K. Ujiper portion of tlio external sm.nll nietnlarsn) 

 bone. 



crucial ligaments are attached. In front is the tuberosity to which the 

 ligament of the patella is fixed. On the sides of the head are the condyles, 

 rough for the attachment of the corresponding ligament'^, and the external 

 having an oval articular fossa for the head of the fibula. 



The INFERIOR OR TARSAL E.XTRE.MITV is inuch Smaller than the superior, 

 but wider than the body, and nearl}' quadrilateral ; its anterior border is flat 

 and rough ; its posterior border is also flat, and presents numerous foramina. 



