ARTERIAL SYSTEM 



417 



The aorta is continued posteriorly into the caudal artery, which 

 usually lies within a coelomic canal enclosed by the ventral arches 



Int. car. 



Bulb. art. 



Si'.bd. 



Out. mag. 



Abd. - 

 Com. il. 

 Com. il. 



Adv. ren. 



* Abd. mag. 



FIG. 322. DIAGRAM OF THE CHIEF ARTERIES (red) AND CERTAIN OF THE VEINS 

 (blue) OF A URODELE. From the ventral side (modified from Bethge's figures 

 of the vessels in Salamandra macnlosa and Triton tceniatus). 



of the vertebrae ; the degree of its development is naturally in 

 correspondence with the size of the tail. In cases where the 

 latter is rudimentary, as in Anthropoids and Man for instance, the 



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