14 DAY USE 



RETURN TO DESK FROM WHICH BORROWED 



BIOLOGY LIBRARY 



TEL. NO. 642-2532 



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



on the date to which renewed. 

 Renewed books are subject to immediate recall. 



NOV 1 6 73 1 7 



BIOLOGY LIBRARY 



LD21A-6m-9,'73 

 (R2491slO)476-A-32 



General Library 



University of California 



Berkeley 



