SOCIETY OF THE UNIVERSITY OF ABERDEEN. 103 



Date of observation, January, 1904. 

 Sex, Male. 



Abnormality in the inferior vena, cavo,. 



The left common iliac vein did not cross behind the artery as 

 usual, but continued its course along the left side of the aorta till 

 it met the left renal vein. The union of these two veins formed a 

 dilated sinus in front of the aorta. This dilated sinus then joined 

 the right common iliac vein at its junction with the right renal vein, 

 and so formed the inferior vena cava at the level of the body of the 

 second lumbar vertebra. The right spermatic vein entered the right 

 common iliac at its junction with the right renal. The left spermatic 

 vein entered the left common iliac about an inch below its junction 

 with the left renal. 



(Signature of observer) A. S. LESLIE. 



Date of observation, January, 1904. 

 Sex, Male. 



Mesentery to descending colon. 



The length of this mesentery from the splenic flexure to the level 

 of the anterior superior spine of the ilium was 4 inches. Horizontally 

 it measured just below the splenic flexure 2^ inches, in the middle 

 3^ inches, and at the level of the anterior superior spine 2^ inches. 



There was an, intersigmoid fossa along the floor of which the 

 left ureter lay. 



Between the two layers of peritoneum forming the mesentery 

 there was a tine sheet of tissue resembling peritoneum and readily 

 separable from both peritoneal layers. The blood-vessels of the 

 bowel lay between this sheet of tissue and the anterior layer of the 

 peritoneum. 



(Signature of observer) A. S. LESLIE. 



