THE TIBIA 



115 



medial ligament and the sartorius and gracilis muscles; below this it is narrower 

 convex from edge to edge and subcutaneous. The lateral surface (Facies lateralis) 

 IS smooth and somewhat spiral. It is wide and concave in its proximal fourth 



Fig. 95. — Right Tibia and Fibula of Horse; Lat- 

 eral View, 

 1, Tuberosity; 2, sulcus muscularis; 3, crest; 4, 

 spine; 5, lateral condyle; 6, head of fibula; 7, impres- 

 sion of anterior tibial vessels; S, shaft of fibula; 9, lat- 

 eral border of tibia; 10, lateral malleolus; 11, groove 

 for lateral extensor tendon. 



Fig. 9G. — Right Tibia and Fibula of Honsi-; Poste- 

 HiOR View. 

 1, ?iledial condyle; 2, lateral condyle; 3, spine; 4, 

 fossa for anterior cruciate ligament; 5, popliteal notch; 

 6, tubercle for posterior cruciate ligament; 7, head of 

 fibula; S, vascular impression; 9, interosseous space; 

 10, shaft of fibula; 11, muscular lines; 12, tubercle; 13, 

 nutrient foramen; 14, medial malleolus; 15, groove for 

 tendon of flexor digitalis longus; 16, lateral malleolus. 



belov^ which it becomes narrower and convex, and winds gradually to the front of 

 the bone; near the distal end it widens a little, becomes flat, and faces forward. 

 The posterior surface (Facies caudalis) is flattened, and is divided into two parts 

 by the rough popliteal line (Linea poplitea), which runs obliquely from the proxi- 



