Jouni. of Anal, and Physwlwjy, Jan. 1901.'] 



[Plate XI7. 





-'- c. 



J- ///'>^ s if^ 



^-Cl 



pc- 



The lateral pelvic wall from within, showing the aponeurotic origin of ilio-coccygeus 

 separated from the underlying obturator fascia. P.O., puhococcygeus ; Il.C, 

 iliosacralis ; F.P., aponeurosis of ilio-coccygeus; O.X., obturator nerve, accom- 

 panied by obturator artery; O.F., fascia covering upper part of the obturator 

 internus ; O.I., obturator internus with fascia removed ; P. A., pudic artery ; C, 

 coccygeus. 



\ 



Dk p. Thompson. 



