1 d K. A. K ï 
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UNIVERS ITY 
Of ILLI N O I S 
505 
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v. £<©- 2.7 
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■ 
| 
BIOLOGY 
| ILLINOIS STATE 
-Ÿ 
* 
LABORATORY 
| OF NATURAL HISTORY 
♦ LIBRARY 
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ACES LIBRARv 
