found: Grovemusic.com WWW site, March 28, 2003(Xylorimba (xylo-marimba, marimba-xylophone): Name given to an instrument of the xylophone family with a compass sufficiently large to embrace the low-sounding bars of the marimba and the highest-sounding bars of the xylophone. As the marimba-xylophone it was a popular instrument in the 1920s and 30s, particularly in vaudeville. The lower notes of the xylorimba sound more like a xylophone than a marimba on account of the bars being thicker and narrower than those of a modern marimba. The terms have been a source of confusion. Many composers have called for "xylorimba," but invariably the parts were written for a four-octave xylophone. Stravinsky's The flood includes a part for "marimba-xylophone," but a marimba was intended. The parts in Roberto Gerhard's Hymnody were originally labelled "xylorimba," but this was later changed to "marimba." Boulez wrote for two true xylorimbas in Pli selon pli; the parts have sometimes been played on two xylophones and two marimbas)