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. 



t 





.. 



DUE 



APR -2 19?q 



Subject to Recall 



!mm: 



LD21A-6w-7,'75 

 (S7525L) 



General Library 



University of California 



Berkeley 



