L. Flexor brevis muscle of the little finger.
M. Flexor brevis pollicis muscle.
N. Abductor pollicis muscle.
OOOO. Lumbricales muscles.
P P P P. Tendons of the flexor digitorum sublimis muscle.
Q. Tendon of the flexor longus pollicis muscle.
R. Tendon of extensor metacarpi pollicis.
S. Tendons of extensor digitorum sublimis; P P P, their digital prolongations.
T. Tendon of flexor carpi ulnaris.
U. Union of the digital arteries at the tip of the finger.