_Locality._--South of the Yakon, between the Umkwa and the sea.
_Locality._--Sea-coast south of the Saintskla.
_Locality._--Between the river Umkwa and the river Clamet, or (ethnologically) between the Killiwashat and the Lutuami.
_Locality._--South-east of the Lutuami, and conterminous with the Shasti.
The list of the tribes and families of the Oregon territory, is now, with one exception, complete, at least according to the present state of our knowledge; whilst the section that still stands over for notice, extends so far beyond it, and is in other respects so remarkable in its distribution, that it forms an ethnological break.
Hence, although in a purely descriptive ethnography it would be advisable to take the tribes of California in immediate succession to those of Oregon, and those of Mexico next in order to the Californian, the present arrangement will be different, and the transition will be from the Oregon Indians to the Indians on the east of the Rocky Mountains. This departure from the strict line of ethnological continuity, is demanded in the present volume; because the question as to the origin of the American population, being considered of so much more importance than the mere description of different tribes, the arrangement follows the order, in which the reader requires facts as a basis for his reasoning, rather than the absolute sequence of ethnological relationship. This accounts for certain departures, which may possibly have been noticed, from the form and method of description adopted in the ethnology of Asia; it also is a reason for sometimes placing together groups on the score of _difference_ rather than _likeness_. Such is the case here. The classes about to be noticed follow those that have already been considered, not because they are closely related, but because they present marks of disconnection which are necessary to be known and appreciated previous to any argument upon subjects like the unity or _non_-unity of the American population, or its connexion or _non_-connexion with the population of the Old World. In other words, as the nearest affinities of the Oregon tribes are with the Californian, the present order of sequence is artificial rather than natural.