1895. ] NEW YORK ACADEMY OF SCIENCES. 237 
as large, is partly inserted into the side of the long tendon of 
the Biceps, while a bundle of its fibres is continued on over the 
elbow, and is inserted into the ulna near the joint. The last de- 
scribed division must represent the short or coracoid origin of 
the Biceps in man. There is no trace of it in Menobranch, 
Axolotl or Newt. The muscle in them, though large, is confined 
to the humerus in its insertion.” 
The Coraco-radialis or Biceps arises from the external sur- 
face of the coracoid, between the Epicoraco-brachial (Pectoralis 
minor) and the short Coraco-brachial, as a fan shaped muscle, the 
fibres of which pass across the short Coraco-brachial and soon 
converge into a long tendon, which runs down beneath the Pec- 
toral. Having passed the Pectoral it receives the fibres of the 
long Coraco-brachial, passes over the elbow joint, and is inserted 
into the palmar surface of the upper end of the radius close to 
the joint. It is supplied by the nerve which perforates the scap- 
‘ula and which supplies also the superficial Coraco-brachial. 
V: Gleno-radial and Coraco-radial. 
Meckel * describes the double-headed Biceps of Ornithorrhyn- 
chus paradoxurus, one head arising from the anterior, the other 
from the posterior coracoid, the muscle passing to be inserted 
into the radius. 
VI. Gleno-radial and Gleno-ulnar. 
Dog. 
Origin: By a single strong tendon from the edge of the glen- 
oid fossa, the tendon passing through the capsular ligament of 
the joint. 
Insertion: By a strong tendon chiefly into the ulna, although 
attached also to the radius by a smaller slip. 
Other forms presenting the same arrangement of the muscle : 
Choleepus didactylus.+ 
Two-toed sloth. 
Origin: By along and strong tendon from the glenoid border of 
the scapula, passing down through the intertubercular groove 
in the capsule of the shoulder. The muscle descends on the 
arm, dividing into two strongly developed bellies, one passing 
with the Pectoralis and Deltoid to the tuberosity of the radius, 
the other with the Brachialis anticus to the coracoid process of 
the ulna. 
*System der Vergleichenden Anatomie, p. 516. 
7 Lueae, J. C. G., Der Fuchsafle und das Faulthier (Lemur macaco and Choloepus 
didactylus) in ihrem Knochen-und Muskelskelet, Frankfurt ®/ m, 1882. 
