Such are the principal characteristics of the religion of the Indians of California as a whole, and of the larger ethnographical areas of the state. It is obvious that with so great a linguistic and political diversification as existed among these Indians, there must have been many local modifications of the scheme which has been outlined. The most conspicuous or best known of these special modifications it is the purpose of the remainder of this paper to consider. In this review the groups to be taken up will, for the sake of greatest convenience of classification, be the linguistic families. These numerous families are territorially so restricted, and usually so small in numbers, that they almost form the equivalent of the tribe in other regions of North America, that is to say, of a subdivision of the family. Strictly there are no tribes in the greater part of California. The families or stocks are the largest linguistic units, usually subdivided into several dialectic areas, each of which contains a number of small village communities that are the only units of political or social organization. In the Northwestern region, in spite of the excessive limitation of this territory, a distinction must be made between three tribes which occupy the heart of the region and show the culture in its most extreme form, and a fringe of surrounding tribes where the Northwestern culture is either less developed or subject to greater extraneous influences. The three more characteristic groups are the Yurok and Karok, small independent linguistic families, and the Hupa division of the Athabascan family. These alone practice the Deerskin dance and the "New Year's" or world-making ceremonies. With them also the peculiar mythological and shamanistic conceptions typical of the region are found in the purest form. The surrounding tribes are the Wishosk or Wiyot, perhaps the Chimariko and some of the Shasta, the Athabascan Tolowa, and the Athabascans southwest of the Hupa. The Yurok held the Deerskin and Jumping dances at three places along the Klamath river, and the Jumping dance alone at three points on the coast, to the south. At the mouth of the river an annual spring ceremony to cause or regulate the ascent of the salmon was made. Until this ceremony had been made salmon were not eaten. The shamans of the Yurok were almost all women. Alone of all the tribes in the Northwestern region the Yurok held no dance or public ceremony on the occasion of a girl's puberty. Their traditions seem to have the peculiar Northwestern qualities perhaps more deeply impressed upon them than even those of their neighbors, the Karok and Hupa, especially in regard to the underlying conception of a previous race and its function. In accord with the development of this conception, the mythical heroes of the Yurok show less approximation to being creators than those of the other tribes, and animals are mentioned in the mythology surprisingly little.