CHAPTER III. 



POSTEEIOR OR ABDOMINAL EXTREMITIES. 



OSTEOLOGY, 



Hip. — OssA iNNOMiNATUM OR COXA, formed of three 

 pieces, iliiiin, pubis and ischium. 



Ilium. — Division: Two faces, three borders, thiee 

 angles. The external face presents tlie iliac fossa ; 

 the internal face the iliac surface and an auricular facet 

 for articulation with the sacrum. The anterior border 

 is concave ; tlie external has a medullary foramen and 

 vascular grooves ; tlie internal forms the great sciatic 

 notch. The anterior external angle has four tuberos- 

 ities, the anterior internal only one ; the posterior 

 angle offers a facette for the cotyloid cavity, the supra- 

 cotyh)id crest, the ileo pectineal eminence, and some 

 muscular imprints. Development : two nuclei of ossi- 

 iication. 



Pubis. — Division : Two faces, three borders, three 

 angles. The superior face is smooth and concave ; 

 the inferior has a large groove for the pubio- femoral 



