BROOKS, William Keith, naturalist, born in Cleveland, Ohio, 25 March, 1848. He was graduated at Williams in 1870, and at Harvard as Ph. died in 1875, after which he became assistant in the Boston society of natural history. In 1876 he was elected a fellow of Johns Hopkins University, then an associate, and since 1883 he has been professor of morphology. Under his direction the Chesapeake zoological laboratory of Johns Hopkins University was organized in 1878, and it has been an-der his supervision since its beginning. In connection with this work he has edited " Studies from the Biological Laboratory" (Baltimore, 1879, et seq.). He has also published "Hand-Book of Invertebrate Zoology " (Boston, 1882) and " Heredity" (Baltimore, 1884). The artificial development of the American oyster is largely due to his efforts, and in that connection he wrote "The Development and Protection of the Oyster in Maryland " (Baltimore, 1884). He has contributed many valuable scientific papers and reports to periodicals, among which are "Conifer, a Study in Morphology," published in the "Philosophical Transactions of the Royal Society" (London, 1881), and " Report on the Stomatopoda collected by H. M. S. Challenger" (1886). Dr. Brooks is a member of the Maryland academy of sciences and other scientific societies, and in 1884 was elected a member of the National academy of sciences.