PLATE 11.

DISSECTION OF THE AXILLA.

A.-Axillary vein, drawn apart from the artery to show the nerves lying between both vessels. On the bicipital border of the vein is seen the internal cutaneous nerve; on the tricipital border is the nerve of Wrisberg, communicating with some of the intercosto-humeral nerves; a, the common trunk of the venæ comites, entering the axillary vein.

B.-Axillary artery crossed by one root of the median nerve; b, basilic vein forming with a, the axillary vein, A.

C.-Coraco-brachialis muscle.

D.-Coracoid head of biceps muscle.

E.-Pectoralis major muscle.

F.-Pectoralis minor muscle.

G.-Serratus magnus muscle, covered by g, the axillary fascia, and perforated at regular intervals by nervous branches called intercosto-humeral.

H.-Conglobate gland, crossed by nerve called "external respiratory" of Bell, distributed to the serratus magnus muscle. This nerve descends from the cervical plexus.

I.-Subscapular artery.

K.-Tendon of latissimus dorsi muscle.

L.-Teres major muscle.

PLATE 12.

DISSECTION OF THE AXILLARY AND

BRACHIAL REGIONS.

A.-Axillary vein cut and tied; a, the basilic vein cut.

B.-Axillary artery; b, brachial artery, in the upper part of its course, having h, the median nerve, lying rather to its outer side; b,* the artery on the lower part of its course, with the median nerve to its inner side.

C.-Subclavius muscle.

C.*-Clavicle.

D.-Axillary plexus of nerves, of which d is a branch on the coracoid border of the axillary artery; e, the musculo-cutaneous nerve, piercing the coracobrachialis muscle; f, the ulnar nerve; g, musculo-spiral nerve; h, the median nerve; i, the circumflex nerve.

E.-Humeral part of the great pectoral muscle.

F.-Biceps muscle.

G.-Coraco-brachialis muscle.

H.-Thoracic half of the lesser pectoral muscle.

I.-Thoracic half of the greater pectoral muscle.

K.-Coracoid attachment of the lesser pectoral muscle.

K.*-Coracoid process of the scapula.

L.-Lymphatic glands.

M.-Serratus magnus muscle.

N.-Latissimus dorsi muscle.

0.-Teres major muscle.

P.-Long head of triceps muscle.

-Inner condyle of humerus.