537.09113 



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111. 





List of Maps 



The general map of the distribution of collections (Map IV.) shows, by the 

 location of the red spots, all the localities from which collections of fishes have 

 been made by us in the work of the Natural History Survey. The distribution 

 maps for the various species indicate in the same way all the localities from 

 which representatives of the species have been taken. For an accurate idea of 

 the significance of these species maps, each should be compared unth Map IV. 



The following numbered list of the counties of the state corresponds to the 

 figures on these maps. 



I. & II. The three sections of Illinois, northern, central, and southern, and 

 the ten stream systems of the state: I., the Galena District, II., the Rock 

 River System, III., the Illinois River System, IV., the Lake Michigan 

 drainage, V., the Mississippi River drainage, VI., the Kaskaskia River 

 System, VII., the Wabash System, VIII., the Big Muddy River System, 

 IX., the Saline River System, and X., the Cairo District. 



III. Glacial geology of Illinois. 



IV. Localities from which collections were made. 

 V. — CII. Distribution of species. 



CHI. Northern species (•) and southern species(A) in Illinois. 



