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Show 1870.] MYOLOGY OF CHAMELEON PARSONII. 865 ! and serratus magnus. The other part arises from the whole r surface of the coracoid. Both parts have a common insertion the ulnar tuberosity, which is close to the head of the humerus. Deeper muscles of flexor aspect of right forearm, the flexor ulnaris and flexor radialis being cut and reflected. B. Biceps. E. U. Extensor ulnaris. F. D. Flexor profundus digitorum. F. P Flexor longus poliicis. F. R. Flexor radialis. F. U. Flexor ulnaris. M. P. Extensor metacarpi poliicis. P. A. Pronator accessorius. P. T. Pronator teres. T. Triceps. Sterno-coracoid (fig. 8, St. S). A muscle, as in the Iguana, takes origin from the inside of the sternum, and is inserted, very strongly, into the antero-internal angle of the inner surface of the precoracoid, just external to its articulation with the sternum. A dense membrane is attached, on the one hand, to the anterior margin of the first rib, on the other hand into the angle of the anterior margin of the shoulder-girdle, between the two parts (fig. 8, C. S) of the subscapularis. This sheet of membrane appears to represent the costo-coracoid muscle of the Iguana. The levator claviculee (figs. 1, 5, 6, 7, 8, 13, Ii) is a very voluminous and more or less double mass. It arises from the basioccipital, and is inserted into the anterior margin of the scapula, overlapped by the omo-hyoid, and conterminous behind with the suprascapular. Subclavius (fig. 13, S. C). This muscle, which I before named * epicoraco-humeral, but which Professor Rolleston considers to be the subclavius, springs from the whole anterior border of the coraco-epi-coracoid. Passing downward and backward beneath the deltoid, it is inserted into the great tuberosity of the humerus, immediately in front of (above, the humerus being vertical) the insertion of the pectoralis, which muscle is superficial to it. The subclavius itself is superficial to the antero-external part of the short coraco-brachialis, with which (especially toward its hinder part) it is closely connected. * P. Z. S. 1867, p. 778. |
