B 



Fig. 51.— Haunch-bone and Sacrum of Man. 



a, Haunch-bone (os innominatum) : a, ilium; b, ischium; c, spine 

 of pubis; 1, acetobulum ; 2, crest of ilium; 3, 4, 5, and 6, iliac 

 spinous processes ; 7, tuberosity of ischium ; 8, ramus of ischium ; 

 9, spine of ischium; 10, 11, and 12, ramus of pubis; 13, obturator 

 foramen. 



B, Sacrum : its anterior surface. 



