THE 



L\ -\OMIXATUM. 



273 



the crest, about two inches in front of its posterior extremity ; it is at first distinctly 

 marked, but as it passes downward and outward to the upper part of the great 

 sacn "-sciatic notch, where it terminates, it becomes less marked, and is often 

 altogether lost. Behind this line is a narrow semilunar surface, the upper part of 

 which is rough and affords attachment to part of the Gluteus maximus ; the lower 



Crest 



Anterior superior 

 spine. 



Anterior inferior spine. 



iEYELLUS INFERIO 



Hio-pectineal line 

 jor Gimbemat's LIGAMENT. 



Spine of os pubisfor 



LIGAMENT. 



Angle of os 

 pubis. 



RECTUS ABDOM:I 



PYRAMIDAL S 



"~*uuinn - i s c ' 



""i. Ramus / 



FIG. 207. Right os innominatum. External surface. 



part is smooth and has no muscular fibres attached to it. The middle gluteal line, 

 the longest of the three, commences at the crest, about an inch behind its anterior 

 extremity, and, taking a curved direction downward and backward, terminates at 

 the upper part of the great sacro-sciatic notch. The base between the superior and 

 middle curved lines and the crest is concave, and affords attachment to the Gluteus 

 medius muscle. Near the central part of this line may often be observed the ori- 

 fice of a nutrient foramen. The inferior gluteal line, the least distinct of the three, 

 commences in front at the upper part of the anterior inferior spinous process, and, 

 i- 



