1879.] MR. W. OTTLEY ON THE GROUND-HORNBILL. 463 



up into numerous branches, which closely resemble one another on 

 the two sides. In the plan (fig. 1) certain vessels are drawn on one 

 side, others on the other, for the sake of greater distinctness. 



The first branch given off, P, is the large artery to the pectorahs 

 primus, from which comes off an internal mammary, IM., and 



Fig. 1. 



Plan of the innominate arteries and their branches. 



another small vessel to the sternum. Opposite the same point the 

 innominate gives off a branch X, which supplies the gland lying 

 on the vertebral artery and anastomoses in its substance with a branch 



