THE SKELETON 



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to more nearly conform to the type of the vertebrae of the 

 preceding or the next group. This is especially true with 



Pig. 7. — The sacrum and first caudal vertebra, ventral view, and last lumbar 

 vertebra, ventrolateral view. AA, anterior articulating process; AP, auricular 

 process; CI, first caudal vertebra; IN, intervertebral notch; L8, last lumbar 

 vertebra; MP, mammillary process of AA; PAS, posterior articulating surface of 

 posterior articulating process; Si, 2, 3, first, second, and third sacral vertebrae; 

 SP, spinous process; TP, transverse process; VF, ventral foramen for ventral 

 root of spinal nerves. 



regard to certain points of such structures as neural spines, 

 transverse processes or centra, but there are certain other 

 points of structure which are pecuhar to the vertebrae of only 



