SLP2000041402- 14 APRIL 2000- ST. LOUIS, MISSOURI, USA: The 1908 work of artist Henri Matisse, "Bathers With a Turtle," is being investigated by the St. Louis Art Museum after it was learned it is one of four pieces the museum has that was once owned by German Nazis, April 14. The work, stolen from German museums by the Nazis in the 1930's was auctioned to area art collectors in 1939.Museum director Brent Benjamin says the Nazis actually confiscated their own property but the museum would return or pay for pieces that can be traced to Nazi Germany. bg/Bill Greenblatt UPI