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 

 DAY AND TO $1.OO ON THE SEVENTH DAY 







f" fi 



MAR 1 1934 



AUfi 1^7935 



i 1938 



NOV 2 1 1973 



RETURNED TO 



liT-7'74 9 



BIOLOGY L5ERARY 





LD 21-50m-8,-32 



