[99] FISHERIES OF THE UNITED STATES. 485 



Genus PHENACOBIUS Cope. 



131. Phenacobius catostomiis Jordan. 



Alabama River (Jordan & Gilbert) ; Etowah River. 



31087. Etowali River. Jordan & Brayton. 



Genus BHLNICHTHYS Agassiz. 



132. Rhiiiichthys atronasus (Mitch.) Agassiz. Black-nosed 



Dace. 



Eastern United States from New England to Virginia, 

 and westward to Ohio. 



15244. Susquehanna River, Bainbridge, Pennsylvania. Dr. T. H. Bean. 



Genus APOCOPE Cope. 



133. Apocope Ynlnerata Cope. 



Utah southward to Arizona, and west to California and 



Oregon. 

 This is a variable species ; it reaches a length of 4 inches 



or more. 



30749. Utah Lake, Utah. Peter Madsen. 



Genus CERATICHTHYS Baird. 



134. Ceratichthys bignttatus (Kirt.) Girard. Red-spotted 



Chub; Horn Chub; Horny Head; Stony Head; 

 River Chub; Jerker. 



From Pennsylvania westward to the Great Basin of 

 Utah ; its distribution southward not definitely re- 

 corded ; not found in the Delaware basin (Cope); 

 Chattahoochee River (Jordan). 



The horn chub takes its name from the tubercles ex- 

 tensively developed on the head of the adults in the 

 breeding season ; it reaches a length of 9 inches, and 

 is used for food. 



16969. Susquehanna River, Bambridge, Pennsylvauia. Dr. T. H. Bean. 



Genus COUESIUS Jordan. 



1 35. Couesius prosthemius (Cope) Jordan. 



Ceratichfhys prosthemius Cope, Cypr. Penn., 1866, p. 365. 



Ceratichthys j)lumbeus Gunther, Cat. Fish. Brit. Mus., vii, 1868, p. 442. 



Upper Great Lakes. 



The species is said to reach a length of 6 inches. 

 20332. Grand Island, Lake Superior. J. W. Milner. 



