100 



PISHES OF ILLINOIS 



TABLE II 



Minnows and the Environment 



Relations to Current 



species and frequency coefficients 



TABLE III 



Relations to Bottom 



SPECIES AND frequency COEFFICIENTS 



Campostoma anomalum. 



Ericymba buccata 



Hybopsis kentuckiensis. . 



Notropis cornutus 



Cliola vigilax 



Notropis blennias 



N. whipplii 



Phenacobius mirabilis . . . 

 Notropis atherinoides . . . 

 Semotilus atromaculatus 

 Notropis umbratilis 



Abramis crysoleucas . . 

 Pimephales promelas. . 

 Notropis lutrensis . . . . 

 Hybognathus nuchalis 

 Hybopsis amblops. . . . 

 Pimephales notatus. . . 



3.79 



2.C8 

 1.69 

 1.68 

 1.50 

 1.09 



TABLE IV 

 Principal Cyprinid^e of Large Rivers 



Species 



No. of 

 collections 



Frequency ^ 

 coefficients g 



Cliola vigilax 



Notropis heterodon . . 



N. hudsonius 



N. lutrensis 



N. jejunus 



N. atherinoides 



Hybopsis storerianus 



1.04 

 .98 

 1.80 

 1.43 

 1.63 

 1.21 

 1.28 



