144 



AKTHROLOGY. 



the spines of the sacrum to the posterior spine of the ilium. The 

 lateral sacro-iliac is triangular, the fibres running obliquely 



Fio. 59. 



Sacral and pelvic ligaments left lateral aspect, o, Superior sacro-iliac ligament ; 

 ft, Sacral ligament ; c, Lateral sacro-iliac ligament ; d, Sacro-sciatic ligament. 



backwards, and it is attached above to the posterior spine and 

 border of the ilium, below to the lateral border of the sacrum. 

 Sacro-sciatic Ligament. This is a broad membranous expan- 



sion situated at the side of the pelvis, helping to form the pelvic 

 cavity. It is attached superiorly to the lateral borders of the 

 transverse processes of the sacrum and first two or three coccygeal 



