H. Humeral attachment of the great pectoral muscle.
I. A layer of fascia, encasing the lesser pectoral muscle.
K. Thoracic half of the great pectoral muscle.
L. Coracoid attachment of the lesser pectoral muscle.
L*. Coracoid process of the scapula.
M. Coraco-brachialis muscle.
N. Biceps muscle.
O. Tendon of the latissimus dorsi muscle, crossed by the intercosto-humeral nerves.
P. Teres major muscle, on which and O is seen lying Wrisberg’s nerve.
Q. Brachial fascia, investing the triceps muscle. .