. / A' /'/< '( '/.,/ TIONS. LIGAMENTS. 



459 



They enter Alcock's canal, which is a delamination of the obturator fascia 

 strengthened by tin; falciform ligament, a special part of the greater sacro-sciatic 

 ligament. 



2 2 



FIG. 330. COCCYX, ANTERIOR ASPKIT. 



I. liase. 2, 2. Cornua. 3. Second coccygeal vertebra. 4. Third coccygeal vertebra. 5. Fourth coc- 

 cygeal vertebra. 6. Fifth coccygeal vertebra. 



FIG. 331. VERTEBRAL COLUMN, LATERAL 

 -7. Cervical vertebra;. 8-19. Dorsal verteline. 20-24. Lumbar vertebrae. A, A. Spinous processes, 

 li, 11. Articular facets of transverse processes of lir>t ten dorsal vertebrae. ( . Auricular surface of 

 sacrum. ]). Foramina in transverse processes of cervical vertebra:. 



The Sacro-coccygeal Articulation and Ligaments : 



1 . L lass. Amphiarthrosis, bones united by cartilage. 



2. Osteological Units. The sacrum and coccyx. 



3. Snbdivisioiial Parts. Sacral and coccygeal corntia. 



4. Xcri'c-supply. The fourth, fifth sacral, and coccygeal nerves. 



