24 



A MANUAL OF ANATOMY 



still perceptible. The lumbar type of the bone is more pronounced 

 than in the case of the tenth. 



The Twelfth Thoracic Vertebra. — This, like the eleventh, has an 

 entire facet on the outer surface of each pedicle for the head of the 



Superior Tubercle 



-External do. 



- - Inferior do. 



-- Mammillary Process 

 __ , _ Accessory Process 



Transverse Process 



Fig. :5. — The Peculiar Thoracic VERTEBRiii and the First Lumbar 



Vertebra. 



twelfth rib, and no facet on the transverse process; The transverse 

 processes are very stunted, and each presents three tubercles — 

 external, superior, and inferior — a condition which also manifests 

 itself, though not so conspicuously, in the transverse processes 

 of the eleventh, and even the tenth. The external tubercle, along 



