As defined by Gallatin, the area occupied by this great family is included in a line drawn from the mouth of the Churchill or Missinippi River to its source; thence along the ridge which separates the north branch of the Saskatchewan from those of the Athapascas to the Rocky Mountains; and thence northwardly till within a hundred miles of the Pacific Ocean, in latitude 52° 30′. The only tribe within the above area excepted by Gallatin as of probably a different stock was the Quarrelers or Loucheux, living at the mouth of Mackenzie River. This tribe, however, has since been ascertained to be Athapascan. The Athapascan family thus occupied almost the whole of British Columbia and of Alaska, and was, with the exception of the Eskimo, by whom they were cut off on nearly all sides from the ocean, the most northern family in North America. Since Gallatin’s time the history of this family has been further elucidated by the discovery on the part of Hale and Turner that isolated branches of the stock have become established in Oregon, California, and along the southern border of the United States. The boundaries of the Athapascan family, as now understood, are best given under three primary groups--Northern, Pacific, and Southern. _Northern group_.--This includes all the Athapascan tribes of British North America and Alaska. In the former region the Athapascans occupy most of the western interior, being bounded on the north by the Arctic Eskimo, who inhabit a narrow strip of coast; on the east by the Eskimo of Hudson’s Bay as far south as Churchill River, south of which river the country is occupied by Algonquian tribes. On the south the Athapascan tribes extended to the main ridge between the Athapasca and Saskatchewan Rivers, where they met Algonquian tribes; west of this area they were bounded on the south by Salishan tribes, the limits of whose territory on Fraser River and its tributaries appear on Tolmie and Dawson’s map of 1884. On the west, in British Columbia, the Athapascan tribes nowhere reach the coast, being cut off by the Wakashan, Salishan, and Chimmesyan families. The interior of Alaska is chiefly occupied by tribes of this family. Eskimo tribes have encroached somewhat upon the interior along the Yukon, Kuskokwim, Kowak, and Noatak Rivers, reaching on the Yukon to somewhat below Shageluk Island,[7] and on the Kuskokwim nearly or quite to Kolmakoff Redoubt.[8] Upon the two latter they reach quite to their heads.[9] A few Kutchin tribes are (or have been) north of the Porcupine and Yukon Rivers, but until recently it has not been known that they extended north beyond the Yukon and Romanzoff Mountains. Explorations of Lieutenant Stoney, in 1885, establish the fact that the region to the north of those mountains is occupied by Athapascan tribes, and the map is colored accordingly. Only in two places in Alaska do the Athapascan tribes reach the coast--the K’naia-khotana, on Cook’s Inlet, and the Ahtena, of Copper River.