Bones of the Lower Extremity. 

 o * 



109 



Spina 



paste 



pnpertor 



Atig-ulus 

 ossis pnbis 



150. The Kight Hip Bone, Os innominatum, outer surface. 



The innominate bone is divided into: the ilium, Os ilei, the ischium, 

 Os ischii, and the p u b e s, Os pubis. 



The ilium shows on its external surface the Linea arcuata externa. The 

 superior border or crest of the ilium, Crista ossis ilei, has an external, 

 middle and internal lip ; (Labium) ; the anterior and posterior borders 

 are notched and each has two projections, Spinae; below the posterior inferior 

 spine is a deep notch, the great sacro-sciatic, Indsura ischiadica major. 

 The ischium has a body, a descending and an ascending ramus; the 

 spine of the ischium, Spina ossis iscJiii, limits the great sacro-sciatic notch 

 inferiorly. The descending ramus ends with the t u b e r o sity, Tuberositas ossis ischii, 

 between which and the spine of the ischium is the lesser sacro-sciatic notch, 

 Indsura ischiadica minor. The ascending ramus ascends from the tuberosity 

 upwards and inwards. 



