204 



SKELETON OF THE DOG 



inent. The nutrient foramen is usually in the proximal third of the lateral border. 

 The tuberosity is not grooved, but bears a distinct mark where the ligamentum 

 patellffi is attached. There is a small facet for the fibula on the postero-lateral part 

 of the lateral condyle, and a small sesamoid bone in the tendon of origin of the 

 popliteus is in contact with the posterior angle of the latter. The distal end is quad- 

 rangular and relatively small. The articular grooves and ridge are almost sagittal. 

 There is a facet laterally for articulation with the fibula. There is a vertical groove 

 medially and a shallower one behind — both for tendons. The proximal end unites 

 with the shaft at about eighteen months, the distal at fourteen or fifteen months. 



Trochanteric 

 fossa 

 Head\^___ \ ^y Trochanter 



Neck. 

 Trochanter 



Neck 

 Trochanter 



Medial rough 

 line 



Lateral _l 

 epicondylc 



'i';;.-l— Medial 

 ;' ' epicondyle 



Trochlea 



major 



Nutrient 

 foramen 



Lateral rough 

 line 



Fig. 224. — Kight Femur op Dog; Anterior View. 



Lateral 

 condyle 



I nlercondyloid 

 fossa 



Fig. 225. — Right Femur of Dog; Posterior View. 

 1, 2, Sesamoid bonfts. 



The fibula extends the entire length of the region. It is slender, somewhat 

 twisted, and enlarged at either end. The proximal part of the shaft is separated 

 from the tibia by a considerable interosseous space, but the distal part is flattened 

 and closely applied to the tibia. The proximal extremity is flattened and articu- 

 lates with the lateral condyle of the tibia. The distal end is somewhat thicker and 

 forms the lateral malleolus. It articulates medially with the tibia and the tibial 

 tarsal bone. Laterally it bears two tubercles. 



The patella is long and narrow. The free surface is convex in both direc- 

 tions. The articular surface is convex from side to side and slightly concave from 

 above downward. 



