Note 49 — BULLETIN OF THE NUTTALL ORNITHOLOGICAL CLUB. VOL. VII. April, 1882. No. 2.

I find that this statement must be modified in regard to Gulls, if not retracted altogether, for since this paper was written I have found the os prominens in Larus glaucus and L. dominicanus. It is present as a small, elongated, trihedral prism, imbedded in the tendon of the extensor patagii longus, and playing over the flattened surface of the scapho-lunar.