BONES OF THE PELVIC LIMB 151 
edge from the volar surface. The angle is very short and blunt, and there is no 
cartilage. 
Four proximal sesamoids are present, two for each digit. They are much 
smaller than in the horse. The bones of each pair articulate with the correspond- 
ing part of the distal end of the large metacarpal bone by their dorsal surfaces, 
with each other and with the first phalanx by small facets. 
The two distal sesamoids are short and their ends are but little narrower than 
the middle. 
BONES OF THE PELVIC LIMB 
The ilia are almost parallel to each other and are also less oblique with regard 
to the horizontal plane than in the horse. They are relatively small. The gluteal 
line is prominent and is nearly parallel to the lateral border; it joins the ischiatic 
spine. A rounded ridge separates the two parts of the pelvic surface. The surface 
Tuber sacrale 
Greater 
Lesser sciatic Ischiatic sctatic 
Tuber ischit notch spine notch 
Tuber 
core 
Shaft of ilium 
Tschium 
Acetabulum 
Ridge Obturator Pubis 
foramen 
Fic. 153.—Riceut Os Cox or Ox; Larerat Virw. 
1, Gluteal line; 2, fossa acetabuli. 
for articulation with the sacrum is triangular. The tuber sacrale is truncated, does 
not extend as high as the vertebral spines, and is separated from the opposite angle 
by a wider interval than in the horse. The tuber coxe is relatively large and prom- 
inent; it is not so oblique as in the horse, and is wide in the middle, smaller at either 
end. The shaft is short and compressed from side to side. 
The ischium is large. Its long axis is directed obliquely upward and back- 
ward, forming an angle of about 45 to 50 degrees with the horizontal plane. The 
transverse axis is oblique downward and inward at a similar angle, so that this 
part of the pelvie floor is deeply concave from side to side. The middle of the 
ventral surface bears a rough ridge or imprint for muscular attachment. The 
ischiatic spine is high and thin, and bears a series of almost vertical rough lines 
laterally. The tuber ischii is large and three-sided, bearing dorsal, ventral, and 
lateral tuberosities. The ischial arch is narrow and deep. The symphysis bears a 
ventral ridge, which fades out near the ischial arch. 
The acetabular branch of the pubis is narrow, and is directed laterally and a 
