114 



THE BONES OF THE LOWER LIMB. 



behind the acetabulum, a sharp process, the spine, projecting with an inclination 

 inwards, forms the inferior limit of the ilio-sciatic notch, and is separated from the 

 tuberosity by a short interval, the sciatic (or small sciatic} notch, against the smooth 

 margin of which, covered in the recent state with cartilage, the tendon of the obtu- 

 rator internus muscle glides. In front of this, on the external surface, a horizontal 

 groove, occupied by the upper border of the obturator externus muscle, lies between 

 the inferior margin of the acetabulum and the tuberosity. The tuberosity presents 



ILIUM 



ISCMIUM 



Fig. 124. RIGHT HIP-BONE OF MALE, FROM BEFORE AND BELOW. (Drawn by T. W. P. Lawrence.) 



a rough pyriform surface continuous with the internal margin of the ramus, on the 

 broader superior portion of which are two impressions placed side by side, the outer 

 for the semimembranosus, the inner for the conjoined origins of the biceps and semi- 

 tendinosus, while the lower part is ridged and gives attachment to the adductor magnus 

 muscle ; the inner border is sharp and prominent where the great sacro-sciatic liga- 

 ment is attached ; and along the outer margin is a faint elongated impression mark- 



