K-J PROCEEDING OF THE ANATOMICAL AND AXTHROl'l )L( XMCAL 



Per cent. 



(a) Those passing below the pyriformis as a single trunk - - 66-6 



(b) ,, ,, ,, ,, ,, as two distinct nerves - 8-3 



(c) Those passing through and under the pyriformis, but not joining - 8'3 

 (</) ,, ,, ,, and joining - 16-6 



These percentages and the sex of the subjects may be compared with 

 the detailed account of an examination of 138 cases recorded in the 

 Journal of Anatomy a ml Phiiaiolnpy for October, 189(3. In the same 

 periodical for 1887 an explanation of the abnormality is offered by 

 Professor Paterson. 



(Signature of observer) MARY W. DURNO. 



Date of observation, November, 1903. 

 Sex, Male. 



Abnormality in muscles of thumb (left}. 



On cutting the abductor pollicis a thin musculo-tendinous band 

 was found. It arose in common with the abductor pollicis and was 

 inserted into the radial border of the first phalanx of thumb directly 

 beneath the abductor. 



(Signature of observers) W. L. STEWART. 



D. W. BRUCE. 



Date of observation, November, 1903. 

 Sex, Male. 



Occurrence of an axillary arch. 



A flat band of muscle fibres arose from the upper end of latissi- 

 mus dorsi. The band was If inches wide at its origin and narrowed 

 to 1 inch where it crossed the axillary vessels, becoming wider again 

 at its insertion into the deep aspect of the pectoralis major tendon. 

 The band was 3 inches long. Beneath the muscular arch was an 

 opening in the fascia lata If inches long and f inch high, and through 

 this opening a lymphatic gland, a small vein and nerve were seen. A 

 fasciculus I inch wide arising with the pectoralis from the fifth rib 

 and passing outwards and upwards for some 3 inches with its axillary 



