WE are indebted to Science of November 28 for the following details of the life and work of Prof. W. A. Locy, professor of zoology in Northwestern University, Illinois, who died on October 9 at the age of sixty-seven. William Albert Locy was born at Troy, Michigan, of Dutch ancestry, and received his early training in the University of Michigan. During the year 1884–85 he held a fellowship at Harvard, where he completed an embryological investigation on'' The Development of Agelena ncevia. “In 1887 he went as professor of biology to Lake Forest University, where he remained nine years. During this period he published important papers on the embryonic development of the elasmobranchs, the derivation of the pineal eye, and the structure and development of the vertebrate head. In 1896 Locy succeeded Prof. E. G. Conklin at Northwestern University, where he remained until his death. His work there had two aspects; one, the developmental history of the sense organs, to some extent a continuation of his earlier researches; the other, the history of biological science. In 1908 he published a collection of historical portraits entitled Biology and its Makers,” which has since been translated into German, while in 1918 he produced “Main Currents in Zoology,” and at the time of his death he was completing another work, “The Rise of Biology.” The significance of his work on the history of science was recognised by his election as the first president of the History of Science Section of the American Association. He was also president in 1915 of the American Society of Zoologists.