SOCIETY OF THE UNIVERSITY OF ABERDEEN. 61 



Date of observation, 17th February, 1911. 

 Sex of subject, Male. 



Abnormal Origin of Vertebral Artery. 



Instead of rising from the h'rst part of the subclavian artery, the vertebral 

 rises from the arch of the aorta on the left side. It rises between the left 

 common carotid and left subclavian arteries on a plane posterior to the 

 carotid, and nearer it than the subclavian. It ascends almost to the carotid 

 tubercle, and then follows its usual course. It is in relation with the L 

 vagus which overlaps it, and is adjacent to the phrenic. On its inner side 

 are the oesophagus and thoracic duct, and to its outer side is the left pleura. 



(Signature of observer) A. J. WILL. 



Flexor Accessorlus. 



The outer head arose from about 45 cms. of the postero-external border 

 of the fibula, the lowest point of attachment being about 7'5 cms. from the 

 tip of the external malleolus. It also arose from the intermuscular septum 

 between the peronei and the flexor muscles. The muscular fibres terminated 

 in a tendon near the postero-inferior border of the lower end of the tibia. 

 The tendon passed in the groove below the sustentaculum tali, was joined by 

 the inner head near the antero-inferior border of the os calcis, and was inserted 

 into the tendon of the flexor longus digitorum. 



(Signature of observers) A. FARQUHAR. 



W. R. WATT. 



Date of observation, 29th April, 1911. 



Sex of subject, Male. 



Rectus Sternalis. 



It appears that the abnormality may be due either to a continuation down 

 of the sterno-mastoid ; or of the Rectus Abdominis up ; but more probably 

 the lowest fibres of the pectoralis major turn up instead of radiating across ; 

 and here they blend completely at the level of the second rib with the 

 sterno-mastoid. If a nerve had been found in connection with it, it would 

 have simplified matters, as it would then have been possible to place it. This 

 abnormality seems to occur in a foetus with too small a head. 



(Signature of observer) REGINALD V. COK. 



