THE AXIAL SKELETON 



33 



Epiphyses of the vertebral bodies 



Costal process 



Processus costarius 



Fifth lumbar vertebra 

 Vertebra lumbalis V. 



Anterior sacral foramina 



Foramina sacralia anterior 



Sutures, not yet fully closed, between the 

 sacral vertebrae 



Costal process 



Processus costarius 



_. Interyertebral disc 

 Lig. intervertebrale 



First sacral vertebra 



Vertebra sacralis I. 



..Secondary epiphyseal plates of the 

 lateral mass 



Fifth sacral vertebra 

 Vertebra sacralis V. 



FIG. 64. UNILATERAL ASSIMILATION AND COMMENCING ANKYLOSIS OF THE FIFTH LUMBAR 

 VERTEBRA WITH THE SACRUM. SEEN FROM BEFORE. 



From a boy seventeen years of age. Epiphyses on the bodies of the sacral vertebra, and along the 



lateral margins of the sacrum. 



Fourth sacral foramen 

 Foramen sacrale IV. 



Ankylosis of the sacral cornu with the 

 coccygeal cornu 



Body of the first coccygeal vertebra 

 Corpus vertebrae coccyges I. 



Hiatus of the sacrum 

 Hiatus sacralis 



Body of the fifth sacral vertebra 

 Corpus vertebrae sacralis V. 



Place of ankylosis of the lateral mass of the 

 sacrum with the first coccygeal vertebra 



FIG. 65. ANKYLOSIS OF THE SACRUM WITH THE COCCYX. SEEN FROM BEHIND. 



From a man forty years of age. 



Anomalous Ankyloses of the Sacrum. 



