Jordan and Ever mann. — Fishes of JSTorth America. 323 



Nucomis nebicwceHsis, Giuard, Proc. Ac. Nat. Sci. Phila., 1850, 190, Sweetwater River, 

 Nebraska. fCoIl. Bowman.) 



Nocumis bellwus, Giraud, I. c, 'IV.i, 185G, Black Warrior River. (Coll. Wiiiohell.) 



Cerutkhthiis leplocephalus, GiRAitT), Proc. Ac. Nat. Sci. Phila., 185G, 21.3, Salem, North Carolina. 



Ccratichlhys <-yclotis, Cope, Proc. Ac. Nat. Sol. Phila., 1864, 277, Grosse Isle, Waterford, Clin- 

 ton River, and Bruce, Michigan; Ginther, Cat., vii, 178, 1808. 



Ci'ralirhtliiiii micropo(joii, Cope, Proc. Ac. Nat. Sci. Phila., 1804, 277, Conestoga River, Penn- 

 sylvania. (Coll. Jacob Stauffer.) 



Cerulichlhi/s sliijmiificiis, CopE, 1. c, 278, 1804, Michigan; Guntiier, Cat., vii, 17'.», 1808. 



CeralichlIiyshi(jiM<itiis, CoPE, Cypr. Pcnn., 300, 1800; Gi-ntiier, Cat., vn, 178, 1808. 



OeruUchtliys biguttatus and C. mieropoijon, Jordan & Gilbert, Synopsis, 212, 1883. 



131. COUESIUS, Jordan. 



Conesiits, Jordan, Bull. Haydcn's Geol. Surv. Terr., iv, 785, 1878, {milneri). 



Body elongate. Head normal, not depressed, the profile convex. Mouth 

 terminal, normal, a well-developed barbel on the anterior side of maxil- 

 lary, just above its tip. Teeth 2, 4-4, 2, hooked, without grinding sur- 

 face. Scales rather small ; lateral line continuous. Dorsal iin over or 

 slightly behi^nd ventrals ; anal basis short. Size rather large. This genus 

 is closely related to the section Xocomis under Hyhopsis, from which it 

 may be separated by the presence of 2 teeth in the lesser row, by the posi- 

 tion of the barbel, and by the smaller scales. Its relations with Stmotilus 

 are equally close. The species are not well known. (Named, for Dr. 

 Elliott Coues, the most versatile and most inspiring writer on American 

 ornithology, (1842 ) who collected the- type species in large numbers.) 



o. Scales in a cross series from dorsal to lateral line about 17; GO in the lateral Hue. 



SOUAMILENTUS, 5.37. 



aa. Scales in a cross series from dorsal to lateral line 10 to 13. 

 b. Scales in the lateral line 03 to 72. 



f. Free margin of dorsal fin concave, the anterior rays extending beyond the last rays 



■when the fin is depressed. PLUMiiEus, 538. 



cc. Free margin of dorsal not concave, the tips of the anterior rays not reaching tips 



of last rays when the fin is depressed. DissiMiLis, 539. 



fib. Scales in the lateral line 55 to 58. 



d. Scales before dorsal about 36. greeni, 540. 



dd. Scales before dorsal about 27. adustus, 541. 



537. COUESIUS SQUAMILENTCS (Cope). 



Head 3f ; depth 5 ; eye 4f. D. 8 ; A. 7; scales 17-66-14 ; teeth 2, 4-4, 1. 

 Form stout, the profile nearly plane; muzzle not prominent. Mouth hori- 

 zontal, the maxillary not reaching orbit ; eye rather small, shorter than 

 snout. Isthmus wide. Barbel quite small. Dorsal fin slightly in advance 

 of ventrals, behind middle of body. Scales quite small. Olivaceous above; 

 sides silvery ; a lateral band of dark punctulations ; fins plain. Henry's 

 Fork of Green River in southwestern Wyoming. (Cope.) Perhaps not 

 distinct from C dissimilis, but the scales in transverse series said to be 

 much more numerous, (squamilentus, small -scaled.) 



CmiltrJdhijn s.piumileuliis. Cope, Hayden's Geol. Surv. Wyom., 1870, (1871), 442, Henry Fork 



of Green River, Wyoming, Colorado basin. 

 Couesms squamilentus, Jordan & (Jimsert. Synopsis, 21S, 1883. 



538. COUESIUS PLUMBEUS (Agassiz). 

 Head4i; depth '4; eye 4. D.8; A. 8; scales 11-60 to 70-7; teeth 2, 4-4, 2. 

 Form of Seniotilus airomaculatn^, but more elongate and less compressed. 



