FIG. 386A. Pelvic girdle and terminal vertebrae of a gibbon. From 

 a Specimen. 



IF.,,, Ilium ; S.V., the first of the two true sacral vertebrae; C, the second last caudal 

 vertebra; AC., acetabulum, formed from the junction of ilium, ischium (IS.)< 

 and pubis (P.) ; P.S., pubic symphysis extending far back to meet the ischium ; 

 the ischium and pubis enclose the obturator foramen. 



