MUSCLES OF THE HIP AND THIGH 365 
the larger central pair ending on the third phalanges of the principal digits, the 
smaller abaxial pair on the accessory digits. The latter are bound down by a 
peculiar spiral band. There is no subcarpal check ligament. The carpal sheath 
envelops the tendon of the deep flexor and that of the deep part of the superficial 
flexor. It extends from the distal third of the forearm to the distal third of the 
metacarpus. At the proximal part of the metacarpus a small muscular band ex- 
tends from the deep flexor tendon to the tendon of the deep part of the superficial 
flexor. Another muscular bundle passes from the deep flexor tendon to the second 
digit. 
The lumbricales are represented by bundles which extend from the deep flexor 
tendon to the tendon of the deep head of the superficial flexor. 
The third and fourth interossei are present. Each sends two slips to the cor- 
responding sesamoid bones and extensor tendon. 
There are flexors, adductors, and abductors of the second and fifth digits. 
MUSCLES OF THE PELVIC LIMB 
SUBLUMBAR MUSCLES 
The psoas minor is intimately united with the psoas major in front, and has a 
long small tendon which ends on the psoas tubercle. It has no thoracic part. 
The psoas major is large and rounded. It begins at the last rib. 
The quadratus lumborum is well developed, and extends to the last three or 
four thoracic vertebre. 
MUSCLES OF THE HIP AND THIGH 
The tensor fascie late is broad, and its fleshy part reaches almost to the patella. 
The gluteus superficialis has a sacral head only; it blends with the biceps 
femoris. 
The gluteus medius has a small lumbar part which does not extend so far 
forward as in the horse. The deep part (Gluteus accessorius) is pretty clearly 
marked. 
The gluteus profundus is extensive, reaching nearly to the tuber cox. 
The biceps femoris has a narrow origin from the sacro-sciatic ligament and 
tuber ischii. It ends below like that of the ox. 
The semitendinosus has two heads like that of the horse. 
The semimembranosus arises from the tuber ischii and has two insertions as 
in the ox. 
The sartorius has two heads of origin, between which the external iliac vessels 
are situated. The medial one arises from the tendon of the psoas minor, the lat- 
eral one from the iliac fascia. 
The graciles are united at their origin even more than in the ox. 
The pectineus is well developed and is flattened from before backward. 
The adductor shows no division and is partially fused with the gracilis. It 
ends on the femur just above the origin of the gastrocnemius. 
The quadratus femoris is large. 
The obturator externus resembles that of the horse. 
The obturator internus is extensive and strong; its tendon emerges through 
the obturator foramen. 
The gemellus is fused in part with the obturator internus. 
The quadriceps femoris is more clearly divided than in the horse, and its 
ction is transmitted by a single patellar ligament. 
The capsularis is absent. 
