ARTICULATIONS. 



Below, and on either side of this groove, are two tubercles: 

 one (anterior obturator tubercle) lies on the lower border of the 

 inner surface of the pubic superior ramus ; the other (posterior 

 obturator tubercle) lies just in front of the cotyloid notch, on 

 the edge of the ischium. [212] 



ARTICULATIONS. 



Vertebral. These are amphiarthrodial between the bodies, 

 and arthrodial between the articular processes. 



Intervertebral Discs. These adhere to the contiguous sur- 

 faces of the bodies and consist of a pulpy centre surrounded by 

 fibres, chiefly oblique and parallel ; they are thickest on their 

 anterior aspects. [261] 



Anterior Common Ligament. This is a broad vertical band 

 on the front of the bodies, attached to their margins and to the 

 discs; the fibres vary in length. [263] 



Posterior Common Ligament. This is a vertical band on the 

 back of the bodies, attached to their margins and to the discs; 

 being wider over the discs than the centres of the bodies, it 

 forms dentations. [263] 



Capsular. A thin but complete capsule, with a synovial 

 membrane, encloses the articular facets. [263] 



Ligamenta Subflava. This is a layer of yellow elastic fibres 

 running from the front of each lamina, just above its lower bor- 

 der, to the back of the lamina below ; it extends from the cap- 

 sule to the spine, where it joins its fellow. [263] 



Interspinous Ligaments. These are obliquely interlacing 

 fibres, running from the tips of two adjacent spines to their 

 opposing margins, and extending from tip to base. [263] 



Supraspinous Ligaments. These are longitudinal bands, in 

 continuity with the preceding, connecting the tips of the 

 spines. [264] 



Intertransverse Ligaments. These are vertical fibres between 

 the transverse processes. [264] 



[187] 



