OCR Text |
Show 1867.] MYOLOGY OF IGUANA TUBERCULATA. Fig. l. 767 *^W Superficial muscles of outer side of thorax and arm, and of extensor surface of forearm,- the gular pouch being cut to show more of the sterno-cleido-mastoid. B. Biceps. B. A. Brachialis anticus. D. 1. First part of deltoid. D. 2. Second part of deltoid. L. M. Depressor mandibula;. E. 0. External oblique. E. E. Extensor carpi radialis. E. TT. Extensor carpi ulnaris. F. U. Flexor carpi ulnaris. L. D. Latissimus dorsi. M. H Mylo-hyoid. P. Pectoralis major. P. My. Platysma myoides. S. C. M. Sterno-cleido-mastoid. S. L. Supinator longus. Tz. Trapezius. MUSCLES OF THE HEAD AND TRUNK. Mylo-hyoid (fig. 1, M. Hi). This is a thin muscular layer, arising from the outside of the posterior part of the mandible and from the inferior margin of the middle and more anterior portion of the bone. It does not, however, extend to its anterior end. Descending inside the skin of the gular pouch its fibres gradually become lost. Fibres similarly disposed below, but ending above in the fascia |