_Leucophaeus scoresbii_, of South Patagonia, the Falkland Islands, and the neighbouring Antarctic seas, has a crimson bill, coarse red feet, with somewhat excised webs, a dark hood in immature examples, and a white tail. _Gabianus pacificus_ of Australia and Tasmania is somewhat like _Larus marinus_, but has a very short stout bill and a black-banded tail. In the genus _Larus_, as throughout this Family, the arrangement followed is that of Mr. Howard Saunders,[199] much of whose admirable work is here incorporated. His first section comprises species with a white tail but no hood, the young having the head striated. Of these, _L. glaucus_, the Burgomaster or Glaucous Gull, and _L. leucopterus_, the Iceland Gull, are the only members of the group with nearly white primaries, the former being larger, with proportionately shorter wings. In summer the former is circumpolar, and the latter occurs from Jan Mayen to Greenland and perhaps the west side of Baffin Bay; in winter both visit Britain, but the latter only reaches the Gulf of Gascony, and Boston in America, whereas its ally extends to the Mediterranean, the Caspian, Japan, California, and the Bermudas. At this season the head shows brown markings; while the young are entirely mottled, though they apparently become creamy white just before assuming the grey mantle. _L. glaucescens_ of the North Pacific, _L. nelsoni_ of North-West America, and _L. kumlieni_ of Cumberland Sound have the quills chequered with grey, and connect the above with the following or blacker-quilled group.