THE LUMBAR VERTEBRA! 



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points down. It is large in some animals, and locks the verte- 

 brae together. 



The articular processes present vertical articular surfaces, 

 the superior concave looking in and back, the superior are 

 farther apart than the inferior, and embrace an inferior pair 

 above them. The inferior are convex and look outward and 

 forward. 



FIG. 4 



Inf. articular process. 



JjfammiUary process. 

 Accessory process. 



. articular process, 



A lumbar vertebra. (Gray.) 



The mammillary process (metapophysis) projects back from 

 each superior articular process. 



The fifth lumbar is massive, the inferior articular processes 

 wider apart than the upper; the transverse processes are broad 

 and conical, and the laminae project into the spinal foramen. 



