SOCIETY OF THE UNIVERSITY OP ABERDEEN. 81 



ORDINARY MEETING. 



14TH NOVEMHEK, 1903. 



Professor R. W. REID, M.D ., F.R.C.S., President, 

 in the Chair. 



The Minutes of the last meeting were read and approved. 



Accounts of anatomical variations found in the dissecting room 

 were read. 



Mr. W. H. Wishart, M.A., B.Sc., exhibited a number of human 

 bones which he had found in a cliff in Orkney and gave some account 

 of the early inhabitants of the islands. 



EECORD OF ANATOMICAL VARIATIONS. 



Date of observation, November, 1903. 



Sex of the six cases examined : 4 male, 2 female. 



Variations in the course of the sciatic nerve. 



In four of the six subjects the course of the nerves was normal 

 below the pyriformis muscle. 



In the fifth subject (male) the external and internal popliteal 

 nerves were separate up to their origin from the sacral plexus. On 

 the right side the external popliteal nerve pierced the pyriformis, 

 while on the left side both nerves entered the gluteal region below 

 the muscle and quite separate from one another. 



In the sixth subject (female) the great sciatic nerve on both 

 sides appeared in the gluteal region in two divisions, one of which 

 passed below the pyriformis, the other perforating that muscle. The 

 two parts blended at the upper border of the superior gemellus 

 muscle. 



On the left side the course of the small sciatic nerve was similar 

 to that of the great sciatic, but was internal or mesial to it. Express- 

 ing the variations of these twelve nerves in percentages : 



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