Z 



o 



I— i 



tt: 



< 



Q 



U 



I— < 



q: 



u 



ui 



< 



-I 



IjL 



o 



a. 



< 



2 



Q 



Lu 



ct: 



UJ 



Q 



1—1 

 to 



Z 



o 



Lu 



U 



Q 



Z 



M 



o 



I 



PLATE n.—GRlUR on VARIATION OF EPIDERMAL COLOR OF CERTAIN 



vSPEClEvS OF NAJADES. 



