Geographical Notices. No. XIX,-Physical Geography of the Report on the Mississippi river, by Humphreys and Abbot, Red River Basin, Arkansas and White River Basin, St. Francis Basin, Ohio Basin, Yazoo Basin: Basin of Small Direct Tributaries, Recent explorations encouraged by the Smithsonian Institution-In the Peninsula of California, by Mr. John Xantus, of the Hudson bay territory, by Mr. Kennicott, by officers of the Company, Northwest Boundary Survey, under Mr. Archibald Campbell: Report of the Superintendent of the U.S. Coast Survey for 1860, Desiderata in East African Exploration