1. School of Biological Sciences, Flinders University, Adelaide, GPO 2100, SA 5001, Australia.
2. Archaeology and Natural History, College of Asia and the Pacific, Australian National University, Canberra, ACT 0200, Australia.
3. Institut d'Archéologie de la Nouvelle-Calédonie et du Pacifique, 65 Rue T. de Laubarède, BP 11423, 98802 Nouméa Cedex, New Caledonia.