WALCOTT, Charles Doolittle, paleontologist, born in New York Mills, New York, 31 March, 1850. He was educated in public schools in Utica, New York, and in 1870 turned his attention to geological work in the central part of the state. In 1876 he became assistant to James Hall, the state geologist, and in 1879 he was appointed assistant geologist on the United States geological survey. His first work was in southern Utah, and in 1882 he was engaged in the survey of the Eureka district in Nevada. In 1883 he investigated the geology of the Grand canon of the Colorado, and in 1884 devoted his attention to the Cambrian geology of New York and eastern Vermont. Subsequently he was engaged in examining the deposits of Deer creek coal-field in Arizona and the palaeozoic area in central Texas. In June, 1883, he was appointed paleontologist in charge of the palaeozoic division of invertebrate paleontology of the United States geological survey. He is a member of scientific societies, and since 1882 has been a fellow of the American association for the advancement of science. His bibliography includes papers in scientific journals, the transactions of learned societies, and the volumes of the United States geological survey.