The Indians of the upper and middle part of the peninsula of California claim descent from the Yuma population north of them; the Tinné-Apache of New Mexico and the Gila river, Arizona, also point to an ancient home in the far north, and both traditions are confirmed by the affinities of their dialects. In many instances, though by no means in all, the migrations are seen to follow the direction of the longitudinal axis of the continent. In North America another line of migration is observed besides, that from west to east; nevertheless, the Yuchi and some Dakota and Iroquois tribes have moved in a direction exactly opposite.