GENERAL CHARACTERS OF THE VERTEBEATA. 



221 



ticulated " together. Also arising from the neural arches at their 

 junction with the body of the vertebra, there may be two lateral 

 processes (d) which are called " transverse processes." This is i,he ■ 



Fig. 158. — A, Vertebra (luiabar) of a Whale : c Centrum or body ; n Neural arches ; 

 5 Spinous process ; a Articular .process ; d Transverse processes. B, Thoracic seg- 

 ment or vertebra : c Centrum of vertebra ; n NeuraVarches, enclosing the canal for 

 the spinal cord ; s Spinous process ; r Ribs ; p Costal cartilages ; h Breastbone or 

 sternum. (After Owen.) 



ordinary structure of the vertebra of a Mammal, and the names 

 here used are those applied to the parts of the vertebra in human 



Fig. 159.— Skeleton of an Armadillo, showing the regions of the vei-tebral column, 

 c Cervical region; d Dorsal region; I Lumbar region; s Sacral region; t Caudal 

 region or tail. 



anatomy. In comparative anatomy, however, these parts have 

 proper technical names which can be employed for them in all ani- 

 mals alike. 



