THIS BOOK IS DUE ON THE LAST DATE 
STAMPED BELOW 
AN INITIAL FINE OF 25 CENTS 
WILL BE ASSESSED FOR FAILURE TO RETURN 
THIS BOOK ON THE DATE DUE. THE PENALTY 
WILL INCREASE TO 5O CENTS ON THE FOURTH 
DAY AND TO $1.OO ON THE SEVENTH DAY 
OVERDUE. 
(BIOLOGY LIBRARY) 
LD 21-100m-8,'34 
