290 



FISHES OF ILLINOIS 



These fishes, though bearing a great general resemblance to H. 

 aspro, are easily distinguished from it by their much smaller mouth 

 and united gill-membranes*, and by the combination of minor color- 

 marks above mentioned. 



Our specimens have the preopercle smooth!, as in H. aspro. 



Described from 2 specimens taken by T. L Hankinson from the 

 Embarras River at Charleston, 111., in 1904. This species was de- 

 scribed in 1883 from Bean Blossom creek, Monroe county, Ind., and 

 has since been taken in various localities from northern Indiana to 

 Arkansas. 



Genus COTTOGASTER Putnam 



Bodv rather robust, not much compressed; mouth moderate or 

 small; forms intermediate between Hadropterus and Boleosoma, having 

 the premaxillaries typically protractile, or sometimes (in C. shumardi) 

 connected with the skin of the forehead by a narrow frenum ; teeth on 

 vomer; middle line of bellv naked, or with caducous scales; vertebrae 

 (C. copelandi) 38 (18 + 20) ; pyloric caeca 3 ; coloration not brilliant. Dart- 

 ers of moderate size, not over 3 inches in length; species few; one known 

 from Illinois. 



Fig 7i) 



COTTOGASTER SHUMARDI (Girard) 



Girard, 1859, Proc, Ac. Nat. Sri. Phila., 100 (Hadropterus). 



I & G . 198 (Imostomai: M. V., 126 (Etheostoma) ; B., I. 92 (Boleosomai. | & E 

 I. 1046; J . 59 (Imostomai. F , 66; 1. . 27. 



Length 2\ to 3 inches; body stout, little compressed except posteri- 

 orly; depth 5.2 to 6 9 in length; greatest width of body usually more 



? S<-c note "ii // aspro. 



t" Preopercle finely serrated" (Jordan md Evermann, kej to Hadropterus) ; "pre- 

 opercle serrulate, a1 least in young specimens" (Jordan, Bull. U. S, Fish Cumin . 



1SSS. p In | 



