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 SO CENTS ON THE FOURTH 

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 OVERDUE. 



BIOLOGY LIBRARY 



SEP 25 1932 

 MAR 31 1S4C 





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LD 21-3m-6,'32 



