SOCIETY OF THE UNIVERSITY OF ABERDEEN. 241 



of a triangular structure seen on the removal of the skin and fascia, 

 superficial to the pectoralis major. 



The long axis of the muscle inclined from above down and out, 

 with the base attached to the sixth rib cartilage, and the apex lying 

 on the second cartilage a length of four inches. The base, tendinous 

 in structure, was 1| inches broad, continuous with the sheath of the 

 rectus abdominis, its inner margin lying about f inch external to the 

 left edge of the sternum. 



The apex, also tendinous, lay on the second rib cartilage, close to 

 the sternum. Here the muscle split into two parts, an inner and an 

 outer. The inner was a thin well-defined tendinous band, about 

 inch broad, which, crossing over the sternum, became continuous 

 with the pectoralis major on the right side. The outer division was 

 fan-shaped attached, internally to the sternum, while externally it 

 radiated into the great pectoral of its own side. 



No nervous or vascular supply could be made out, and there was 

 no similar structure on the right side. 



(Signature of observer) G. SPENCER MELVIN. 



ABERDEEN: PRINTED AT THE UNI.ERSITY PRESS. 

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