SOCIETY OF THE UNIVERSITY OF ABERDEEN. 57 



of the aorta, behind and to the left of the former. It runs obliquely 

 across the vertebral column to the upper border of the first rib on the 

 right side, and has in front of it : the trachea and oesophagus, the 

 two common carotids, the left vertebral and the left subclavian 

 arteries ; the left innominate and the right internal jugular veins ; the 

 right and the left vagi, the left recurrent laryngeal, and the right 

 phrenic, nerves. Behind, it lies in close contact with the vertebral 

 column. 



(Signature of observer) ALFRED J. W. STEPHEN. 



Date of observation, June, 1905. 



Sex, Female. 



Abnormal tibial arteries. 



The anterior tibial artery was very small, and ended in muscular 

 branches to the muscles in the front of the leg. The posterior tibial 

 was also very small, and seemed a branch of the peroneal, which was 

 much enlarged. The latter followed its normal course, but its 

 anterior peroneal branch, much enlarged, pierced the interosseous 

 membrane about two inches above the ankle, descending to the front 

 of the ankle joint, giving off the external malleolar branch and a 

 branch corresponding to the normal anterior peroneal, and, at the 

 upper border of the Y-shaped ligament, passed obliquely inwards 

 to the space between the tendon of the extensor proprius hallucis 

 and the innermost tendon of the extensor longus digitorum, taking 

 the place of the dorsalis pedis from the anterior tibial. As the posterior 

 tibial was very small, the plantar arch was formed mainly by the 

 communicating branch from the dorsalis pedis. 



(Signature of observers) JOHN A. BEATTIE. 



WILLIAM ANDERSON. 

 Date of observation, May, 190:"). 



Sex, Male. 



Occurrence of a Meckel's diver ticulum. 



It is given off the free border of the ileum 6^ feet (198 cm.) from 

 the ileo-caecal junction. It communicates directly with the lumen of 



