MUSCLES OF THE PELVIC LIMBS. 197 
Relations.—Lateral surface with the semitendinosus (Fig. 
90, 7), the biceps femoris (Fig. 68, 2), and distad with a small 
part of the adductor femoris (Fig. 92, g),and with the gas- 
trocnemius (Fig. 92, 7). Medial 7 
surface with the gracilis (Fig. 
gI,) and distad with the 
sartorius (Fig. g1,’@). Cra- 
nial (or dorsal) border at 
the origin with the quad- ff 
ratus femoris (Fig. 90, /f 
J); for the remainder 
of its length with the 
adductor femoris (Fig. 
go, #). Caudal bor- 
der with the integu- 
ment proximad. 
Action, — Extensor 
of the thigh. 
M. sartorius (Fig. 91, 
a; Fig. 68, 7).—A large flat 
muscle along the medial side 
of the thigh near its cranial 
(dorsal) border. 
Origin from the ventral half of 
the crest of the ilium and from the 
medial half of its ventral border craniad % 
of the auricular impression. The caudal 
third of the origin is by a thin tendon, 
the rest by fleshy fibres. 
Fic. 91.—MuscLEs ON THE MEDIAL SIDE OF 
THE LEG. 
a, M. sartorius; 6. M. gracilis; c, M. iliopsoas; d, M. 
rectus femoris; ¢, M. vastus medialis; 7, M. pectineus; 
g, M. adductor longus; 4, M. adductor femoris; 7, M. 
semimembranosus; 7, M. semitendinosus; 4, medial 
head of M. gastrocnemius; /, M., plantaris; 7, M. flexor 
longus hallucis (’, its tendon); 2, M. flexor longus 
digitorum; (z’, its tendon); 0, M. tibialis posterior; Z, 
M. tibialis anterior; g, M. interosseus of second digit. 
I, patella; 2, calcaneus; 3, medial malleolus; 4, second ° 
metatarsal; 5, transverse ligament of the lower leg. WS 
