BARTSCH, PAUL (1871– ), American biologist, was born in Tuntschendorf, Germany, on Aug. 14, 1871. Following his graduation at the State University of Iowa in 1896 he joined the staff of the U.S. National museum, Washington, in which he served as aid in the division of mollusks from 1896 to 1905 and as assistant curator of marine invertebrates from 1905 until 1914 when he was made curator. In 1899 he became professor of zoology in George Washington university, and in 1901 lecturer on medical zoology in Howard university. The U. S. bureau of fisheries in 1907 placed him in charge of the inquiry into the pearl mussel industry of the Mississippi valley. Subsequently he was the representative of the Smithsonian institution on various scien tific expeditions to the waters of the Philippines, Cuba, Haiti and the Bahamas. In 1912 he took charge of the experimental breed ing of Cerions on the Florida Keys for the Carnegie and Smith sonian institutions. He made war gas experiments for the U.S. bureau of mines, and in 1918 produced a poison gas detector for the Chemical `'Warfare Service. His published writings include more than 25o technical papers, chiefly on biological subjects.