United States Geological Survey. Bulletin No. 268: Series C, Systematic Geology and Palæontology. Charles D. Walcott, Director. Miocene Foraminifera from the Monterey Shale of California: with a few Species from the Tejon Formation. By Rufus M. Bagg, jun. pp. 1–55, plates i-xi. 8vo. Washington, 1905.