14 DAY USE 



RETURN TO DESK FROM WHICH BORROWED 



BIOLOGY LIBRARY 



TEL. NO. 642-2531 



This book is due on the last date stamped below, or 



on the date to which renewed. 

 Renewed books are subject to immediate recall. 



MAR 1 8 1971 



MAR - 4 1971 7 



LD 2lA-15m-2,'69 

 7slOH76 A-32 



General Library 



University of California 



Berkeley 



