Otis T. Mason describes the Hudson collection of Pomo basketry from the Russian River region of California, acquired by the U.S. National Museum in 1899. He tabulates the plants, minerals and animal materials used, with scientific and Pomo names, and explains their preparation, colors and trade values in shell and magnetite money. He then classifies the baskets into twined and coiled types, giving Pomo names and technical descriptions of each. He closes with notes on ornamentation, including feather-work and the symbolic meaning of patterns.