ANATOMICAL STRUCTURE OF ANTHROPOID APES. 169 



and in this act of extension it is supported by the 

 long extensor which acts upon the phalanges. It 



Fig. 52. — Palmar muscles of gorilla, a, Anterior ligament, b. Remains of the 

 skin of palm, here covered with a very sinewy sl^in. c,f. Oblique fibres of 

 the ligaments of the sheath of the flexor tendons of fingers. 1, 2, Flexor 

 tendons. 3, Spaces between the heads of the flexor brevis pollicis, whence 

 in man the tendon of the flexor longus pollicis issues (comp. Fig. 51, 5). 

 4, 3, 3', 5, Abductor, flexor brevis, abductor pollicis. 6, 7, 8, Opponens, flexor 

 brevis, abductor, minimi digiti. 9, Iiunibricales. 10, Supinator longus. 12, 

 Flexor sublimis digitorum. 13, Flexor minimi digiti. 14, Flexor carpi ulnaris. 



