126 



PRACTICAL ANATOMY: 



pectineal line. This surface is smooth and concave for 

 the anterior three-fourths of its extent, and is called the 

 venter of the ilium. Posteriorly it is flattened, rough 

 above for the attachment of ligaments ; below it presents 

 an ear-shaped, articular surface, called the auricular sur- 



FIG. 58. Os INNOMINATUM, OUTER SURFACE. 



face, for articulation with the sacrum. The crest, or 

 superior border, presents a double curve; it terminates 

 anteriorly in the anterior superior spine, posteriorly in 

 the posterior superior spine, and presents two lips, outer 

 and inner; also, an intermediate surface for the attach- 

 ment of muscles. The anterior border presents the two 



