1895. ] NEW YORK ACADEMY OF SCIENCES. 249 
or origin portion, represented by the variations just described, 
and has obtained a secondary attachment to the humerus near 
the bicipital groove and the insertion of the Pectoralis major. 
This group would therefore form the last of a series of varia- 
tions of a muscle arising from the glenoid margin and finding 
its insertion at the ulnar border of the forearm. 
Cases : 
1. 9, Ireland, aet. 27. October 25, 1893. 
Plate XXXIV. Both upper extremities present -the same 
variation. 
A third additional Biceps head arises from the outer surface 
of the humeral shaft and capsule of the shoulder joint, and from 
a strong tendinous band into which the upper fibres of a Coraco- 
brachialis brevis are inserted. 
The connections with the shoulder capsule, found in the Cap- 
sulo-pectoral, Gleno-ulnar and Gleno-epitrochlear variations, is 
retained in this instance as one of the points of origin of the 
accesssory head. 
2. 9, U.S. negro, aet. 24. December 27, 1893. 
Plate XXXV. Right. upper extremity. 
A third bicipital head arises from the anterior surface of the 
shaft of the humerus, almost directly continuous with the lower 
margin of the Pectoralis major tendon and attached to the lower 
portion of the bicipital groove. 
The muscle passes down on the outer side of the arm, sepa- 
rated from the upper and outer portion of the Brachialis anticns 
by some branches of the musculo-cutaneous nerve and muscular 
arterial branches. It then turns inwards beneath the main 
muscle to join the common tendon on the deep aspect and along 
the ulnar margin. 
5. COMBINATION OF CAPSULO-PECTORAL OR GLENO-ULNAR WITH 
GLENO-EPITROCHLEAR FIBRES. 
Case: 
$, U.S., white, aet 23. January 80, 1894. 
The two extremities present the variations already described 
as follows: 
Right upper. Gleno-epitrochlear tendon (No. 4). 
Left upper. Gleno-ulnar muscle, “a,” No. 6, Plate XXV. 
6. COMBINATION OF TENDINOUS GLENO-ULNAR AND Coraco-EPI- 
TROCHLEAR. 
Case: 
Q, Ireland, aet. 72. January 9, 1894. 
Plate XXXVI. Right upper extremity. 
