Contents

17 September 1999
Vol 285, Issue 5435

About The Cover

Cover image expansion

COVER Invading species such as the rosy wolf snail (Euglandina rosea) (shell length, ~5 cm), a Florida import that now preys on native Hawaiian snails, are devastating ecosystems worldwide. Although ecologists still cannot predict invasions with certainty, researchers and policy-makers are finding new ways to battle these organisms. See the special News Focus beginning on page 1834 [Photo: Jack Jeffrey]