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 irregular^ 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, FinL'i,A, and Tarsus. 



A. Tibia. 



1. 2. Articulfttory snrfanflR. 



3. Tuberosity. 



4. Sijine. 



5. External malleolus. 



6. Surfaces articulating with astraj 



B. Fibula. 



C. Os calcis. 



7. Point of hock. 



]). Astragalus. 



E. Os scaphoides. 



F. Os cuneiforme mnguum. 

 Q. Os cuboidcs. 



H. Os cuneiforme parvum. 

 I. Upper part of large metatarsal bone. 

 K. Upper portion of the external small mntatai-snJ 

 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 ligaments, and the external 

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



The inferior or tarsal extremity is much smaller than the superior, 

 but wider than the body, and neai^ly quadrilateral ; its anterior border is flat 

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



