1906
Born December 17 at South Bend, Indiana
1912-1913
Parents deceased, Congo Belge
1919
Northwestern School of Taxidermy, correspondence course
1922-1924
Attended Transylvania College, Lexington, Kentucky
1923
Illinois State Museum, zoological specialist, summer
1923-1924
Student assistant in Zoology, Transylvania College
1924-1926
Attended University of Chicago, B.S., 1926
1925
Expedition to British Guiana as student at Kartabo Laboratory of University of Pittsburgh
1927
Illinois State Museum, zoological specialist, summer
1927-1928
Zoologist, Mt. Desert Island, Maine, Biological Survey, summers
1927-1931
Attended University of Wisconsin, M.S., 1929, Ph.D., 1931
1927-1931
Graduate assistant in zoology at University of Wisconsin
1929
Married Dorothy Louise Dunn
1929
Published first article on mollusks, "A preliminary list of the Mollusca of Dane County, Wisconsin"
1929-1930
Zoologist, Wisconsin State Geological and Natural History Survey, summers
1931-1933
Professor in Zoology at Crane Junior College, Chicago
1931
Elected to the Wisconsin Academy of Sciences, Arts and Letters
1933-1934
Taught botany and zoology at Kelly Senior High School, Chicago
1934-1942
Senior scientific aid, Division of Mollusks, U. S. National Museum
1939
Invented collapsible funnel fish trap
1940-1952
Member, National Speleological Society
1942-1946
Assistant curator, Division of Mollusks, U. S. National Museum
1944
Expedition to San Jose Island, Pearl Islands, Panama, for U. S. Army Chemical Warfare Service, with Alexander Wetmore
1946
Expedition to Bikini Atoll, Marshall Islands, for U. S. Army/Navy Operation Crossroads, with Leonard P. Schultz
1946
Promoted to associate curator, Division of Mollusks, U. S. National Museum
1946
Member, Washington Biologists Field Club
1946-1955
Member, Atoll Research Panel of the Pacific Science Board
1947
Bikini Scientific Resurvey, Marshall Islands
1948-1951
Associate editor, Journal of the Washington Academy of Sciences
1950
Vice-President, American Malacological Union
1951
President, American Malacological Union
1951-1953
Editor, Journal of the Washington Academy of Sciences
1952
Expedition to Raroia, Tuamotu Islands, for Pacific Science Board
1953
Life member, American Malacological Union
1953-1954
Senior editor, Journal of the Washington Academy of Sciences
1959
Life member, National Rifle Association
1960
Trip to Mt. St. Hilaire, Quebec, with American Malacological Union
1961
Expedition to New Caledonia
1961-1963
Vice-President, Biological Society of Washington
1962
Research trip to St. Petersburg, Florida
1962
Member, Society of Systematic Zoology
1962
President, National Capitol Shell Club
1963-1964
Acting president, Biological Society of Washington
1964
International Conference on Estuaries, Jekyll Island, Georgia
1965
Expedition to Dominica
1966-1967
Expedition to Mexico
1975
Retired from Smithsonian Institution