studying recent and fossil mollusks. He would hold this position until his death. As part of his work for the U.S. Geological Survey, Dall made trips to study geology and fossils: in the Northwest (1890, 1892, 1895, 1897, 1901, and 1910), in Florida (1891), and Georgia (1893). In 1899 he and an elite crew of scientists, such as the expert in glaciology John Muir, were members of the Harriman Alaska Expedition, aboard the S.S. George W. Elder, along the glacial fjords of the Alaska Coast, the Aleutian Islands and to the Bering Strait. Many new genera and species were described. Dall was the undisputed expert on Alaska, and the scientists aboard were often surprised by his erudition, both in biology and in respect to the cultures of the native Alaskan peoples. His contributions to the reports of the Harriman Alaska Expedition, include a chapter Description and Exploration of Alaska, and Volume 13, Land and Fresh-water Mollusks. He spent two months at the Bishop Museum in Hawaii examining their shell collection. Societies and honors He was elected member of most of the U.S. scientific societies, vice-president of American Academy of Arts and Sciences (AAAS) (1882, 1885), a founder of the National Geographic Society, and the Philosophical Society of Washington. In 1897 he was elected to the National Academy of Sciences. He was a Foreign Member of the Geological Society of London. His eminence also earned him several honorary degrees. Mount Dall, an peak in the Alaska Range, now in Denali National Park and Preserve, was named after Dall by A.H. Brooks of the U.S. Geological Survey in 1902. Publications Dall published over 1,600 papers, reviews, and commentaries. He described 5,427 species, many of them mollusks. Many of his papers were short, but a number of his publications were comprehensive monographs. Report on the Mollusca, Part I Bivalvia Bulletin of the Museum of Comparative Zoology Harvard, Vol. XII (1885–1886) Report on the Mollusca, Part II Gastropoda & Scaphopoda Bulletin of the Museum of Comparative Zoology Harvard, Vol. XVIII, XXIX – (June 1889) On the remains of later prehistoric man obtained from caves in the Catherina Archipelago, Alaska Territory, and especially from the caves of the Aleutian Islands (1878) Meteorology and Bibliography of Alaska The Currents and Temperatures of Bering Sea and the Adjacent Waters (1882) Alaska Coast Pilot (1883) List of Marine Mollusca (1884) Report on the Mollusca Brachiopoda and Pelecypoda of