790 



BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



Subfamily LEUCISCIN^. 

 GrouiJ GoBioNES. 



Gohio* Cuvier. 



Semolilus Rafinesque. 



Symmeirurus Jordan. 



Pogonichthys Girard. 

 Group TiNC^. 



Tinea* Cuvier. 

 Group Mylochili. 



Mylochilus Agassiz. 

 Group Mylophaeodontes. 



Mylopliarodon Ayres. 

 Group Leucisci. 



Scardinms* Bonaparte. 



Idus* Heckel. 



Ptychochilus Agassiz. 



Gila Baird & Girard. 



Telestes*f Bonaparte. 



SquaUus*i Bonaparte. 



Phoxinus*\ Agassiz. 



Phoxinellus Heckel. 



LeuGos*\ Heckel. 



Leuciscus Cuvier. 



Subfamily ABRAMIDIN^. 

 Group Abramides. 



Leucaspius* Heckel. 



Notemigonus Rafinesque 



Ahramis* Cuvier. 



Blieea* Heckel. 



Alburnus'^f Heckel. 



Aspinus* Agassiz. 

 Group Peleci. 



Pelecus* Agassiz. 

 Subfamily PLAGOPTERIN^. 



Lepidomeda Cope. 



Plagopterus Cope. 



Meda Girard. 

 Subfamily AULOPYGINiE. 



Aulopyge* Heckel. 

 Subfamily BARBINiE. 



Barhus* Cuvier. 

 Subfamily CYPRININiE. 

 Group Cyprini. 



Cyprinus* Linnaeus. 

 Group Carassii. 



Carassius* Nilsson. 



The following species are to be referred to the genus Couesius: — 



Couesius dissimilis, = Leticosomus dissimilis Girard ; Couesius pros- 



themius, = Ceratichthys prosthemius Cope; Couesius squamilentus, = 



Ceratichthys squamilentus Cope ; Couesius physignaihus, = Ceratichthys 



physignathus Cope. 



In C. dissimilis, the dorsal fin is almost directly over the ventrals; the 

 mouth is large and quite oblique, the jaws being about equal; the maxil- 

 lary barbel is very distinct; the scales are about 11-70-9. In the collec- 

 tion are 50 specimens of all sizes, from one inch in length to about five. 



Genus EHINICHTHYS Agassiz. 

 8. — Rhinichthys maxillosus Cope. 



1864 — BhinicMliys maxillosus Cope, Proc. Ac. Nat. Sci. Phila. 278. 



Bhiiiichihys maxillosus Gunther (1868), Cat. Fishes Brit. Mus. vii, 190. 

 Bhiniehthys maxillosus JoR. (1873), Bull. U. S. Geol. Sur. Terr, iv, 426. 



Forty-three specimens of this species were obtained, from one to four 

 inches in length. The species is somewhat intermediate between the 

 Eastern H. cataractce {B. nasutus Ag.) and E. atronasus. The specimens 

 agree well with Professor Cope's figure in the Report of the Ichthyology 

 of Lieutenant Wheeler's Explorations, but they differ slightly in propor- 



