[Illustration: Fig. 306. _a_, Rawhide pouch, Salish or Chinook; _b_, Design from parfleche, Fort Colville, Washington.] As soon as we move farther inland we find an art that, in its essential characteristics, is subject to the Plains art. The style and decoration of the clothing are essentially those of the Plains. Rude pictography is used extensively. There is hardly any attempt to fit the pictographic representation to the decorative field that serves merely as the background on which the representative design is conveniently placed. Most of the geometric patterns that do occur are closely related to eastern forms. A rawhide pouch from the interior of British Columbia (fig. 28, p. 36) may serve as an example. On parfleches and rawhide pouches from Fort Colville and from Columbia River (fig. 306) we find the same designs that are characteristic of eastern paintings on rawhide (see figs. 144-146 pp. 170-172). Analogous forms are found in bone carvings from the Tahltan in Alaska (fig. 307). In the southern parts of the plateaus of British Columbia, simple lines and circles with center are the most common decorative pattern on bone and on wood. Representative sculpture is rare although a few ancient specimens have been found. The archaeological remains prove that at an early time the same art type prevailed in the Delta of Fraser River. The symbolism of the patterns is very weak, but seems analogous to that found in the east. [Illustration: Fig. 307. Scraper of bone, Tahltan.] [Illustration: Fig. 308. Detail of imbricated basketry.]