BONES OF THE PELVIC LIMB 



133 



sacral segments. The roof is concave in both directions. The floor is deeply con- 

 cave, particularly in the transverse direction. The cavity is narrower and its axis 

 is inclined strongly upward in the posterior part. The distance between the acetab- 

 ulum and the external angle of the ilium is only a little (ca. 3 to 4 cm.) more than 

 the distance between the former and the tuber ischii. 



The femur has a relatively small shaft, which is cylindrical in its middle, pris- 

 matic below. The trochanter minor has the form of a rough tuberosity, and is 

 situated higher up than in the horse and encroaches on the posterior surface. The 

 trochanteric ridge (Crista intertrochanterica posterior) connects it with the tro- 



FiG. 102. — Frontal Section of Left Femur of Ox, Fig. 103. — Froxtal Section of Left Tibia of Ox, 



Front View. Anterior View. 



These figures show the internal architecture of these bones, and especially the great extent of the medullary cav- 

 ity as compared with those of the horse (Figs. 67 and 72). 



chanter major. The third trochanter is absent. The supracondyloid (plantar) fossa 

 is shallow. The proximal extremity is very wide. The head is smaller than in the 

 horse and the articular surface extends considerably on the upper surface of the 

 neck. Instead of the notch there is a small depression on the middle of the head 

 for the attachment of the round ligament. The neck is well defined except above. 

 The trochanter major is very massive and is undivided; its external surface is 

 very rough. The trochanteric fossa is deep, but does not extend so far downward as 

 in the horse. The distal end presents no very striking differential features, but the 

 lips of the trochlea are less oblique than in the horse, and converge very slightly 



