186 THE MUSCLES. 
Origin from the distal surface of the pisiform bone and from 
the transverse ligament on the ulnar side of the pisiform. It 
ends in a slender tendon which runs along the ulnar side of the 
fifth metacarpal to its 
Insertion into the ulnar side of the base of the first phalanx 
of the fifth digit. 
M. flexor brevis digiti quinti (Fig. 89, 2; Fig. 88, ¢).— 
This covers the ventral surface of the fifth metacarpal, and is 
really the interosseus of this digit. 
Origin by fleshy fibres from the ventral surface of the base 
of the fifth metacarpal; from the ventral process of the unci- 
form bone, and from the transverse ligament proximad of the 
fifth metacarpal. 
Insertion by fleshy fibres into the ventral border of the 
proximal end of the first phalanx of the fifth digit. 
M. opponens (adductor) digiti quinti (Fig. 89, g). 
Origin by a flat tendon from the ventral surface of the os 
magnum on the ulnar side of the adductor pollicis (4). It 
passes toward the ulnar side and distad, the fibres diverging to 
their 
Insertion (1) into nearly the whole of the radial surface of 
the fifth metacarpal, (2) into the base of its first phalanx. 
V. MUSCLES OF THE PELVIC LIMBS. 
1. Muscles of the Hip. 
A. ON THE LATERAL SURFACE OF THE HIp. 
Fascia of the Thigh.—After the removal of the superficial 
fascia with its fat and blood-vessels, there is seen a strong 
glistening fascia, the fascia lata (Fig. 68, 2, page 117), cover- 
ing the vastus lateralis muscle over the dorsal half of the thigh. 
Ventrally it dips between the vastus lateralis and the biceps 
femoris and, becoming gradually thinner, is lost on the surface 
of the former muscle. Passing over the dorsal border of the 
thigh, it extends beneath the sartorius and is attached to the 
dorsal border of the vastus medialis. Toward its distal end 
the fascia is continuous with the tendon of the biceps femoris 
and dorsad with the border of the sartorius muscle, while 
