ISSN 1444-8939 PRINT ISSN 1447-1981 ONLINE MAGNT RESEARCH REPORT NO. 6 December 2000 MORPHOLOGY, SYSTEMATICS AND EVOLUTION OF THE MARSUPIAL GENUS NEOHELOS STIRTON (DIPROTODONTIDAE, ZYGOMATURINAE) PETER MURRAY, DIRK MEGIRIAN, THOMAS RICH, MICHAEL PLANE, KAREN BLACK, MICHAEL ARCHER, SUZANNE HAND AND PATRICIA VICKERS-RICH Museums and Art Galleries of the Northern Territory