Journ. (if Aiud, am^ Plajslologij^ Jan, 1001.} 



[Plate XVI. 



\ ■ ■■■% w ' ' 



Pelvic diaphragm iu tlie orang-utan {Siinia Safi/riis), seen from above after separation 

 of the pubic bones. P.P., psoas parvus; P., i)yriformis ; F., fascia covering psoas 

 magnus, prolonged downwards to become continuous with the fibrous aponeurosis 

 of the ilio-coccygeus ; S.L., small sacro-sciatic ligament; O.N., obturator nerve 

 accompanied by the obturator artery; Il.C, ilio-coccygeus; R., rectum; P.O., 

 pubo-coccygeus ; F.P., aponeurosis of the ilio-coccygeus; C, coccygeus ; S.C, 

 sacro-coccygeus. 



Dr p. ThOxMpson, 



