ECOLOGICAL CROSS SECTION OF THE MISSISSIPPI. 



231 





SOUR! ( 



ILLINOIS 



Bluff 



Lowland 





River 



Lowland Bluff 



— 



Upland 



15 16] 17 



5 



18 



19 



11 



12 



12 



20 



21 



22 



23 



26 



25 



14 



11 



12 



12 



11 



1 



18 



1 



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24 



16 



15 



14 



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6 





















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 X 

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S 

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17 









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18 

 19 



20 

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23 

 24 

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 Fr 



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26 









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27 









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28 









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29 

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31 

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33 









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34 









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35 







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X 







X: 



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36 





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X 



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X 



























37 









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1 

 1 



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38 

 39 

 40 

 41 







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 Fr 



X 



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42 









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43 

 44 

 45 

 46 

 47 

 48 

 49 

 50 



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1 

 1 



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 1 



1 



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51 





X 





X 



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X 



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H 











Ix 



J 



f 



xl 







■ 





52 1 







Fr 



Jl 



1 



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1 

 1 



1 





4- 





4- 





-f 





