1868.] Mr. J. Wood on Variations in Human Myology. 493 



tendon which passed over the coraeoid groove, gave off a shp to the 

 coraco-acromial hgament (e) as it perforated it, and was implanted partly 

 into the capsular ligament (/), and partly perforated it to join the fibres 

 of the glenoid {g). The middle fibres (5), arising from the third and 

 fourth ribs and fascia, were attached by a shorter tendon to the inner 

 margin of the coraeoid, and connected by aponeurosis to the origin of the 

 coraeoid muscles. The lower fibres (c & d), arising from the fifth rib and 

 the adjacent intercostal and epigastric aponeuroses below the border of the 

 pectoralis major muscle (with which they were partly blended), divided 

 soon into two parts, of which the upper (c) was inserted into the fascia of 

 the coraeoid muscles (cut off short in the woodcut) ; while the lower (c?) 

 were united in a tendon which passed over these muscles, pierced the 

 capsular ligament above the subscapularis (divided in the cut), and finally 

 ioined with the uppermost tendon to be inserted into the upper part of 

 the glenoid ligament. A bursal opening existed at this point between the 

 joint and the subscapular bursa. In the adjoining figure the pectoralis 

 major, part of the deltoid, the coraeoid muscles, and the subscapularis are 

 partly removed, and the shoulder-joint opened to show the glenoid ligament. 



In this curious instance the lower part of the muscular arrangement is 

 evidently a " chondro-coracoid " muscle joined up to the pectoralis minor 

 at two separate points, viz. at its origin and insertion. At its origin it 

 coincides with the usual origin of this muscle, reaching down nearly as far 

 as the latissimus dorsi ; while at its insertion it is fused with the glenoid 

 tendon of the pectoralis minor. Its course over the origins of the coraeoid 

 muscles quite coincides with a frequent insertion of the " chondro-coracoid,^* 

 It resembles considerably the intermediate pectoral of the lower animals. 



This remarkable insertion into the glenoid ligament goes far to corrobo- 

 rate the views expressed by Macalister (Journal of Anat. and Phys. No. 2. 

 May 1867, p. 317) upon the homology of his coraco-glenoid ligament with 

 the humeral tendon of the pectoralis minor. 



In another male subject (No. 13) the upper fibres of the lesser pectoral 

 passed over the coraeoid process to be inserted into the coraco-acromial 

 ligament. In a female (No. 32) the upper fibres of the muscle on the 

 right side were inserted by a flat aponeurotic tendon, half an inch wide, 

 into the lower border of the clavicle, forming almost a separate sterno- 

 clavicular muscle. 



11. St erno- scapular. — In 5 males (on fcoth sides) and in 5 females (of 

 which 2 were on both sides, 2 on the right, and 1 on the left only) it was 

 found that a portion of the lower fibres of the subclavius muscle were im- 

 planted upon the tubercle of the coracozc? process, and were usually separated 

 by a distinct interval from the rest of the muscle, constituting a decided 

 formation in most of the specimens of a sterno-scapulur muscle, first dis- 

 tinguished and figured by the author in his paper of 1865 (fig. 4), and 

 compared with the muscle of that name in animals. 



In the subject there figured a muscle was found, coexisting with the stcrno- 



