ACKNOWLEDGMENTS
I thank T. Holland, F. Marx, J. Mead, T. Rich and H. Sues for comments and provision of materials; D. Bohaska, W. Longmore, R. O’Brien, and C. Potter for access to collections; C. Buell for permission to reproduce his artwork; and J. Geisler and two referees for their comments on the manuscript. This research was initiated during a Smithsonian Postdoctoral Fellowship and sustained by the Harold Mitchell Foundation and Museum Victoria.
Handling editor: Jonathan Geisler