The anterior margin of the sternum, between the right and left anterior lateral processes receives in sockets the feet of the coracoids.
Eventually, when the right and left feet of the coracoids overlap each other, the anterior sternal spine contains a foramen.
In most birds the feet of the coracoids do not touch each other; in some groups they meet, in others one overlaps the other, the right lying ventrally upon the left.
4 Merrem, as did many others in his time, calls the coracoids "clavicultiae "; but it is now well understood that in birds the real claviculae form the furcula or " merry-thought."
6 There is no appearance of his having at all taken into consideration the far more trustworthy characters furnished by the anterior part of the sternum, as well as by the coracoids and the furcula.