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 Kan- 
garoo and Bennett’s Wallaby. Meckel’s account of the muscle in 
the Great Kangaroo seems to correspond with my own. 
Fig. 7. 
Pectoral muscles of Petrogale. 
A. Superficial part of pectoral. E. Subclavius. 
B&C. Deeper parts of pectoral. F. Deltoid. 
D. Pectoralis quartus. | : 
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. 
