| OCR Text |
Show 696 MR. F. G. PARSONS ON THE [June 16, The Biceps has one broad head, which rises continuously from the coracoid and the top of the shoulder-joint; it is entirely outside the capsule of the shoulder. The innermost fibres, those coming from the coracoid, are inserted into the tubercle of the radius, the others pass to the ulna. Macalister describes two separate heads, coraco-radial and gleno-ulnar, in the Great Kangaroo and Bennett's Wallaby. Meckel's account of the muscle in the Great Kangaroo seems to correspond with m y own. Fig. 7. Pectoral muscles of Petrogale. A. Superficial part of pectoral. E & C . Deeper parts of pectoral. D. Pectoralis quartus. E. Subclavius. F. Deltoid. The Brachialis anticus consists of two parts: the outer comes from behind the surgical neck of the humerus and from the outer part of that bone ; the inner, which is small, rises from the lower third of the anterior border. The two heads unite to be inserted into the ulna with the deep part of the biceps. |
