34 PROCEEDINGS OF THE ANATOMICAL AND ANTHROPOLOGICAL 



ORDINARY MEETING. 



22ND FEBRUARY, 1912. 

 Mr. E. GORDON, M.A., Vice-President, in the Chair. 



The minutes of the last meeting were read and approved. 



Mr. A. Hunter Brown, President of the Society, gave a paper on " The 

 Pelvic Diaphragm and Pelvic Fasciae." 



In his discussion he divided the pelvic floor into two layers ; one being 

 formed by the sphincters, the other being the pelvic diaphragm, formed by 

 the levatores ani and coccygei. Mr. Brown entered into the comparative 

 anatomy of this diaphragm, and traced its evolution from the three flexor 

 muscles, viz, pubo-coccygeus, ilio-coccygeus, and ischio-sacralis of the tails of 

 lower animals. He also dealt with the changes in origin of the levator ani, 

 and explained Prof. P. Thompson's theory of the "white lines" of the pelvis. 



In describing the fasciae of the pelvis, Mr. Brown entered into detail 

 regarding the formation of Alcock's canal and the structure of the triangular 

 ligament. 



On the motion of Mr. R. D. Lawrence a cordial vote of thanks ,was 

 accorded to Mr. Brown for his paper. 



