CALIFORNIA 
ACADEMYOF 
SCIENCES 
Scientific <Pu6(fcations of the 
Cafifomia Academy of Sciences 
Alan E. Leviton, Guinevere O.U. Wogan, and Michele L. Aldrich 
California Academy of Sciences, San Francisco, California 
Introduction and Historical Overview 
Alan E. Leviton and Michele L. Aldrich 
California Academy of Sciences 
San Francisco, California, USA 
November 19, 2010 
