60 



HUMAN ANATOMY. 



THE ILIUM, broad, flat, and triangular, forms the greater 

 part of the bone, its base above, its apex at the acetabulum. 



The external surface, or dorsum, concave in front and be- 

 hind, presents from below upward 



A groove, just above the acetabulum, for the reflected tendon 

 of the rectus femoris muscle; 



The inferior curved line, marking the lower border of the 

 gluteus minimus; 



The middle curved line, the longest of the three, marking the 

 lower border of the gluteus medius ; and 



FIG. 25. 



1, ilium; 2, Ischium; 3, pubes; 4, crest of ilium; 5, 6, and 7, 

 middle, inferior, and superior curved lines; 8 and 9, anterior superior 

 and inferior spinous processes; 10 and 11, posterior superior and 

 inferior spinous processes; 12, spine of ischium; 13, great sacro- 

 sciatic notch; 14, lesser sacro-sciatic notch; 15, tuberosity of ischium; 

 16, ramus of ischium and pubes; 17, horizontal ramus of pubes; 19, 

 acetabulum; 20, obturator foramen. 



The superior curved line, the shortest marks the lower an- 

 terior border of the gluteus maximus, and from the surface below 

 which arise a few fibres of the pyrif ormis. 



The upper expanded border forms the crest of the ilium, 

 terminating in front in 



The anterior superior spinous process, giving origin to the 

 sartorius and tensor vaginas femoris muscles and Poupart's liga- 

 ment, below which is 



The anterior inferior spinous process, for the ilio-femoral 

 ligament, and the straight tendon of the rectus femoris muscle; 

 and behind in 



