228 



THE SKELETON. 



it proceeds downwards from the acetabulum, expands into a large tuberosity, 

 and then, curving upwards, forms with the descending ramus of the pubes a 

 large aperture, the obturator foramen. 



The Pubes is that portion which runs horizontally inwards from the inner 

 side of the acetabulum for about two inches, then makes a sudden bend, and 

 descends to the same extent; it forms the front of the pelvis, supports the 

 external organs of generation, and has received its name from being covered 

 with hair. 



The Ilium presents for examination two surfaces, an external and an internal, 

 a crest, and two borders, an anterior and a posterior. 



External surface or dorsum of the ilium (Fig. 164). The back part of this 



Fig. 164. Right Os Innominatum. External Surface. 



CCRELUU WEER1 



surface is directed backwards, downwards, and outwards ; its front part for- 

 wards, downwards, and outwards. It is smooth, convex in front, deeply con- 



