WILLIAMS, Henry Shaler, geologist, b, in Ithaca, New York, 6 March, 1847. He was graduated at the Sheffield scientific school of Yale in 1868, and received the degree of Ph. D. in 1871 from that university for advanced studies. Subsequently he became professor of palaeontology in Cornell university, which chair he still holds, and he is also engaged in palaeontological researches for the United States geological survey. Professor Williams is a member of various scientific societies, and since 1882 has been a fellow of the American association for the advancement of science. His contributions to scientific literature include papers that have appeared in the "American Journal of Science," "The American Naturalist," the "Bulletins of the United States Geological Survey," and in the proceedings of the societies of which he is a member, and he is also the author of "Bones, Ligaments, and Muscles of the Domestic Cat" (New York, 1875).