1895. ] NEW YORK ACADEMY OF SCIENCES. 245 
tendon at the lower border of which a short muscular belly de- 
velops which joins the Biceps. 
Between the long and short bicipital heads an additional ten- 
don slip arises from the capsule, near the base of the coracoid 
process, and, passing down on the outer side of the short Biceps 
tendon, receives some upper fibres of insertion of a short Coraco- 
brachialis superior, and then joins the outer margin of the short 
Biceps head just before the latter meets the long head. 
The left side of the same subject presents an instance of the 
next succeeding form. 
5..¢, Germany, aet. 52. December 14,1893. 
Very large accessory glenoid head, $’’ broad, passing to the 
united bellies of the Biceps. Upper tendinous portion very 
distinct and adherent to Pectoralis tendon. 
6. 9, U.S. white, aet. 23. January 30, 1894. 
Plate XXV. Left upper. 
Gleno-ulnar tendon connected but loosely with deep surface 
of Pectoralis major; leaves tendon of Pectoral as a distinct 
band at about the middle of its posterior surface and a short 
distance below the distal margin of the pectoral tendon, ex- 
pands into a superficial broad and flat muscular belly, which 
descends upon the long bicipital head, lying in close connection 
with the outer margin of the coracoid head from which it is 
completely separable to a point midway between the lower 
border of the Teres major and Latissimus dorsi and the elbow. 
The fibres of this accessory head then join the coracoid head 
along its external border. About 3 cm. above the internal 
condyle the long head joins the tendon of insertion, developed 
on the deep and external aspect of the combined coracoid and 
accessory heads. 
The bicipital fascia receives some superficial and oblique 
fibres (decussating) from the outer and anterior aspect of the 
radial tendon. 
The right arm of the same subject presents a Gleno-epitroch- 
lear slip (vide infra). 
(b.) Tendon of origin of Gleno-ulnar muscle is completely 
Free from Pectoralis major tendon, under cover of which it lies. 
Cases : 
1. $, U.S., negro, aet. 50. December 14, 1893. 
Plate XXVI. Left upper extremity of subject whose right 
extremity is described under “a 4,” Plate XXIV. 
Long, distinct glenoid tendon, overlying long bicipital ten- 
don, under cover of Pectoralis major, but not connected with 
the same. Becomes muscular opposite lower third of pectoral 
tendon and crosses over long bicipital head to join its inner 
margin at about the middle of the arm. 
