Cladistic Biogeography: interpreting patterns of plant and animal distributions. 2nd edition. Christopher J. Humphries & Lynne R. Parenti. New York: Oxford University Press. 1999. xii+187pp. ISBN 0 19 854818 4. £35.00 (hardback). Panbiogeography: tracking the history of life. Robin C. Craw, John R. Grehan & Michael J. Heads. New York: Oxford University Press. 1999. viii+229pp. ISBN 0 19 507441 6. £45.00 (hardback).