Reports of the UNIVERSITY OF CALIFORNIA ARCHAEOLOGICAL SURVEY No.41 The University of California Archaeological Survey Department of Anthropology University of California Berkeley 4, California PAPERS ON CALIFORNIA ARCHAEOLOGY: 63-69 Contents Page 63. Robert F. Heizer 64. Joan M. Silsbee 65. A. B. Elsasser and 66, Robert F. Heizer 67. A. B. Elsasser 68. M. A* Baumhoff Aboriginal California and Great Basin Cartography.. . .. Determining the General Source of California Olivella Shells. . E. Contreras Modern Petrography in Central California and Western Nevada. . Prehistoric Central Califormia: A Problem in Historical- Developmental Classification . Aborigiftal Use of Restrictive Sierran Environments . . . e . Ecological Determinants' of Population O * . . * . * * O * . . . . . . . . . . . . . . . . . . . . . . . . 1 10 12 19 27 34 42 69. Elizabeth Grinnell Making Acorn Bread . O O . O . . . Illustrations and Tablesi Following page Paper No. 64 Figure 1. Olivella species from the California Coast and the Gulf of California,. . . . . . . a . a ? * . * - 0 0 10 Paper No. 65 Figure 1. Modern petroglyph groups at three different sites . . . Table 1 Occurrence of petroglyph elements at seven sites in Califomia and Nevada, . o . . . . . l . . . . ... Table 2. Table 1 continued O. O . O . O . . O . . O O . . . . 14 14 14 i