Larus hyperboreus -- Glaucous Gull; Gaviota blanca, goéland bourgmestre. Alternate name on piece: Larus glaucus [Glaucous gull] Drawing on tissue: this is a fragment which was clipped out, showing only the second bird; marks on both pieces show that Gould item 1912 was at one time pasted over the corner of Gould item 1630. Artist's name(s): Gould, John; Hart, William Matthew.