152 SKELETON OF THE OX 
little forward. The anterior border is marked by a transverse groove which ends 
below the rough ilio-pectineal eminence. The symphyseal branch is wide and 
shin. 
The acetabulum is smaller than in the horse. The rim is rounded and is 
usually marked by two notches. One of these is postero-medial and is narrow 
and deep; it leads to the deep acetabular fossa and is often almost converted 
into a foramen by a bar of bone. The other notch is antero-medial, small, and 
sometimes replaced by a foramen or absent. 
The obturator foramen is large and elliptical. Its medial border is thin and 
sharp. 
Fusion of the three bones occurs at seven to ten months. 
The pelvic inlet is elliptical and is more oblique than in the horse. In a cow 
Median 
Wing of crest of — Tuber 
sacrum sacrum — sacrale 
Tuber 
COLE 
Shaft of ilium 
Acetabulum 
ANY Tuber ischii 
] 
Ilio-pectineal eminence 
Symphysis pubis of Obturator foramen 
Ventral ridge 
Fic. 154.—Prtvic Bones or Cow, VIEWED FROM IN FRONT AND SOMEWHAT FROM BELOW. 
of medium size the conjugate diameter is about nine and a half inches (ca. 23 to 24 
em.), and the transverse diameter about seven inches (ca. 18 em.). The anterior 
end of the symphysis lies in a transverse plane through the junction of the third and 
fourth sacral segments. The dorsal wall or roof is concave in both directions. The 
ventral wall or floor is deeply concave, particularly in the transverse direction. 
The cavity is narrower and its axis is inclined strongly upward in the posterior part. 
The distance between the acetabulum and the tuber cox 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 distally. 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- 
