— 
1870.) MYOLOGY OF PLATYDACTYLUS JAPONICUS. 417 
from the humerus immediately beyond the insertion of the deltoid, 
the other dorsad of the insertion of the infraspinatus, commencing 
immediately distad of the insertion of the teres minor. The scapular 
section, or long head, arises from the posterior edge of the scapula, 
just above the glenoid cavity, by a flat tendon, which is further 
strengthened by an aponeurosis, which is attached to the head of the 
humerus, binding down the teres minor ; the inner section occupies 
the internal surface of the humerus, commencing beyond the sub- 
scapularis, between coraco-brachialis and latissimus dorsi. The 
united muscular mass of these origins occupies the dorsal surface of 
the humerus, and is inserted into the proximal extremity of the ulna, 
developing a sesamoid bone or olecranon in the tendon. 
Levator scapule arises by two heads, one from the scapula aud 
clavicle, close to the articulation between those two bones, the other 
from the cartilaginous suprascapular; they pass forwards, and are 
inserted together into the transverse process of the first cervical 
vertebra or atlas. 
Subscapularis arises from a small part of the outer surface of the 
scapula covered by the infraspinatus, and from the whole internal 
surface of that bone, with the exception of the posterior superior 
angle, and from the interior inferior angle of the suprascapula, also 
from the upper two-thirds of the inner surface of the coracoid ; the 
fibres converge and are inserted into the inner and lower edge of the 
head of the humerus, close to the capsular ligament. This evi- 
dently corresponds to the subscapularis; and perhaps the dorsal 
part to the teres major, as it is partially separable from the re- 
mainder at its insertion, which is a trifle beyond that of the rest of 
the muscle. 
Sterno-coracoidalis arises from the anterior and lower part of the 
internal and lower surface of the coracoid, oceupying rather more 
than one-sixth of its superficies, slightly overlapping the edge of the 
last muscle, and is inserted into the antero-lateral edge of the sternum. 
Some of its fibres proceed further back, and are inserted into the 
anterior extremity of xiphisternum and into the cartilages of the 
second and third sternal ribs. 
Serratus consists of two distinct parts. The anterior section arises 
from the whole length of the suprascapula, and, passing downwards 
and forwards, is inserted by three slips into the expanded termina- 
tions of the three anterior cervical ribs. The posterior section arises 
from the postero-inferior border of the scapula and suprascapula, 
and, passing downwards and backwards, is inserted into the extre- 
mities of the fourth and fifth cervical ribs. From this there is a 
continuation in the same direction to the xiphisternum and cartilages 
of the fourth and fifth sternal ribs, the whole being parallel with the 
fibres of the obliquus externus abdominis. 
Flexor carpi radialis arises from the upper part of the inner or 
flexor condyle of the humerus, and from the proximal two-thirds of 
the radius, and is inserted into a bone of the carpus which appears 
to correspond with the seaphoid. 
Flexor carpi ulnaris arises from the lower part of the inner condyle 
