44 MR. ST. GEORGE MIVART ON THE [Jan. 10, 
The pectoralis major arose from the whole length of the sternum, 
the sternal ends of the ribs, and the sterno-clavicular articulation, 
but not from the clavicle itself; it was inserted into the external 
edge of the bicipital groove of the humerus, side by side with the 
deltoid, and having the same upper and lower limits as that muscle 
has at its insertion. 
The pectoralis minor consisted of two very distinct portions. The 
first arose from the sternum (below the second bone), and from the 
sternal ends of the ribs beneath, extending as far down as the origin 
of the pectoralis major. The second part arose exclusively from the 
aponeurosis of the external oblique. The fibres of these two portions 
converged (leaving a triangular space between them covered by the 
pectoralis major), and were together inserted into the capsular liga- 
ment of the humerus. 
The trapezius was inserted into the whole length of the spine of 
the scapula to the extremity of the acromion, but it had no insertion 
into the clavicle. 
The rhomboideus major and rhomboideus minor were represented 
by asingle muscle; but there was a very distinct and separate mus- 
cular slip which arose from the supra-occipital, and was inserted by 
a distinct tendon into the inner side of the posterior margin of the 
scapula, just below the triangular surface at the root of the spine. 
The latissimus dorsi separated into two portions when about 
2 inches from the axilla: the smaller and inner portion joined the 
tendon of the teres major ; the larger and outer portion was inserted 
into the bicipital groove. 
The dorso-epitrochlear arose from the larger division of the latis- 
simus dorsi (just where it became tendinous), and was inserted, as 
usual, into the olecranon. 
A small, short muscular slip arose from the outer side of the ten- 
don of the coraco-brachialis, aud was inserted into the humerus just 
above the insertion of the teres major. 
The extensor indicis ended in two tendons inserted, respectively, 
into the second and third digits. 
The extensor minimi digiti similarly gave tendons to the fourth 
and fifth digits. 
The extensor primi internodii pollicis was entirely absent. 
The extensor ossis metacarpi pollicis gave rise to two tendons, one 
being inserted into the trapezium, the other into the radial border 
of the first metacarpal. 
The flexor profundus consisted of four fleshy bellies, of which the 
first arose from the anterior surface of the radius and interosseous 
ligament, the second from the anterior surface of the ulna, the third 
from the inner condyle of the humerus, and the fourth from the 
inner border of the ulna. The last was very distinct, and supplied 
the tendon for the fifth digit. The other three soon fused together, 
and gave origin to a very broad tendon, from the middle of the super- 
ficial surface of which a small tendon arose, which crossed over and 
was inserted into the pollex. 
The scansorius was completely fused with the gluteus minimus. 
