. The anatomy of the frog. Frogs -- Anatomy; Amphibians -- Anatomy. MUSCLES OF THE ANTEEIOR EXTREMITY. 79 the upper or visceral surface of the scaj)ula. It arises from a bony ridge found on the upper surface of the coracoid and of the j^roc. coracoideus of the scap- ula. The muscle runs outwards and is inserted, after widening, into the inner surface of the crista delto'idea of the humerus ; it is antagonistic to the deltoid, and draws the raised arm back- wards and towards the trunk. Fig. Right shoulder, from below, arm strongly abducted. cl Clavicle. CO Coracoid. d Deltoideus. d' Clavic
. The anatomy of the frog. Frogs -- Anatomy; Amphibians -- Anatomy. MUSCLES OF THE ANTEEIOR EXTREMITY. 79 the upper or visceral surface of the scaj)ula. It arises from a bony ridge found on the upper surface of the coracoid and of the j^roc. coracoideus of the scap- ula. The muscle runs outwards and is inserted, after widening, into the inner surface of the crista delto'idea of the humerus ; it is antagonistic to the deltoid, and draws the raised arm back- wards and towards the trunk. Fig. Right shoulder, from below, arm strongly abducted. cl Clavicle. CO Coracoid. d Deltoideus. d' Clavicular portion of deltoid. h Humerus. ss Subscajmlar muscle. (b) Muscles Oil I lie superficial surface. 51. M. infraspinatus (Fig. ^"j, between Id and d)i/, Fig. 7 I /). Dugès, adscapulo-hnméral, n. 67. The m. infrasjimatus re- presents the VI. infraspina- tus, teres major and minor oî human anatomy. It is of triangular form, with the broad base directed in- wards ; it arises from the whole of the upper sur- face of the suprascapula except along the inner border which is formed of hyaline cartilage alone : from this origin the fibres converge outwards to a fiat tendon which unites with that of the m. latis- simtis dorsi to be inserted into the crista deltoidea hu- meri, by means of a thin, triangular, tendinous ex- pansion. Fig. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ecker, Alexander, 1816-1887; Haslam, George. Oxford, Clarendon Press
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