112 



MK. F. E. BEDDARD ON THE 



[Feb. 7, 



only for a short portion, and the two arteries reunite a con- 

 siderable distance behind the junction of the cerebellar arteries 

 to form the basilar. The anterior spinal arteiy is at its point 

 of union with these arteries slightly asymmetrical. In fact it 

 joins the right cerebellar arteiy, though only just before the 

 union of the latter with the left. The two cerebellar arteries 

 are themselves symmeti'ical with regard to the ventral median 

 line of the brain ; the right-hand one, at any I'ate, lies in front 



Text-fi^. 19. 



M.ceA 



Brain of Tantalus ibis (ventral aspect), sliowing the principal branches of the 

 arterial system. 



Lettering as in text-fig. In. 



of the 6th nerve. I could not detect the nerve on the other side 

 of the brain. The cerebellar artery divides into the two usual 

 branches. That which supplies the medulla is connected with a 

 coarse network of arteries on the upper surface of that part of the 

 brain which puts the artery into communication with its fellow 

 on the opposite side of the brain. The basilar ai-tery gives off' a 



