ADVISORY BOARD 

 Biological Research Series 



PAUL A. WEISS, Ph.D. 

 Professor of Zoology 

 University of Chicago 



DAVID R. GODDARD, Ph.D. 



Professor of Botany 

 University of Pennsylvania 



FRANCIS 0. SCHMITT, Ph.D. 

 Professor and Head of the Depart- 

 ment of Biology 

 Massachusetts Institute of Technology 



