Lawrence, Dr. G.H.M. (1956, 1 letter) Leach, Abe P. (1942–1957, 2 letters) Leach, Dr. Henry Goddard (1946–1947, 3 letters) Leale, Marion (1951, 4 letters) Leao, Dr. Aristides A.P. (1946, 1 letter) Lee, Frederic P. (1947, 2 letters) Lembke, Hans (1957, 1 letter) Lenz, Dr. (1956, 1 letter) Leon, Dr. J. Alberto (1952, 6 letters) Leonidas Leyon L. (1952, 1 letter) Jestrand, Eric Lil (1948, 2 letters) Instituto Lillo (1956, 1 letter) Lindquist, Dr. Emory (1957, 1 letter) Linford, James B. (1956, 2 letters) Linnean Society of London (1951–1956, 4 letters) Linsley, E.C. (1956, 3 letters) Littell, Harrington (1950, 5 letters) Livermore, Mrs. Norman B. (1951, 2 letters) Lockwood, E. Wilson (1948–1956, 9 letters) Loeb, Dr. Leonard (1957, 1 letter) Lonergan, A.J. (1957, 2 letters) Long, R.W. (1948, 3 letters) Look, Richard M. (1947, 1 letter) Lorenzo-Andreu, Dr. Antonio (1951, 2 letters) de Loriano, Dr. Ema D. (1950, 2 letters) Lesekann, Joseph (1954, 2 letters) Lourteig, Dr. Alicia (1956, 1 letter) Loustau, Laurent A. (1957, 2 letters) Love, Dr. R. Merton (1950–1953, 6 letters) Luce, Mrs. Betty (1955–1957, 3 letters) Luce, Henry R. (1950, 2 letters) Luckwill, Dr. L. C. (1948, 2 letters)