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. 



DEC 4 - 1969 



^a 



9 1969 20 



LD 21A-12m-5,'68 

 (J401slO)476 



General Library 



University of California 



Berkeley 



