BONES OF THE PELVIC LIMB 203 
The femur is relatively much longer than in the horse or ox. The shaft is regu- 
larly cylindrical, except near the extremities, where it is wider and compressed from 
before backward. It is strongly curved in its distal two-thirds, convex in front. 
The posterior surface is flattened transversely, narrow in the middle, and widens 
toward each end. It is bounded by two rough lines (Labium laterale, mediale) 
which diverge toward the extremities. The third trochanter and the supracondyloid 
fossa are absent. There are two supracondyloid crests, the medial one being small. 
The nutrient foramen is in the proximal third of the posterior surface. The head 
is a little more than a hemisphere and has a shallow fovea behind and lateral to its 
center. The neck is well defined. The trochanter major does not extend as high 
CES ET Wing of ilium 
Tuber core 
Vascular impression 
J 
= - Sacro-iliac articulation 
z | 
i 
= Nutrient foramen 
7. 
Shaft of ilium 
Ilio-pectineal line 
Ilio-pectineal 
pare Tubercle 
eminence 
e) 
ey 
Acetabulum 
Acetabular branch of 
pubis 
Symphyseal branch of CF 
pubis tes =~ Obturator foramen 
Symphyseal branch of £- 
ischium = Acetabular branch of 
} ischium 
. 
4 
y, Tuber ischit 
Ischial arch 
Fie. 223.—Prtvic Bones or Doc; VENTRAL VIEW. 
1, Body of first sacral vertebra; 2, wing of sacrum; 3, sacral canal; 4, median crest of sacrum; 5, pelvic surface of 
sacrum. 
as the head; a thick ridge runs from its anterior surface to the neck. The trochanter 
minor has the form of a blunt tuberosity. The trochanteric fossa is round and 
deep. The ridges of the trochlea are practically sagittal in direction and are al- 
most similar. The intercondyloid fossa is wide. Just above each condyle pos- 
teriorly there is a facet for articulation with the sesamoid bone which is developed 
in the origin of the gastrocnemius muscle. Union of shaft and extremities takes 
place at about one and a half years. 
The tibia is about the same length as the femur. The shaft forms a double 
curve; the proximal part is convex medially, the distal part laterally. The prox- 
imal third is prismatic, but is compressed laterally and is long from before backward. 
The remainder is almost regularly cylindrical. The crest is short but very prom- 
