218 CONTRIBUTIONS TO TsORTll AMERICAN ICHTHYOLOGY - IV. 



rather small, 4 in head. Scales rather small. Lateral line somewhat 

 decurved. Twenty-four scales in front of dorsal. Fins moderate. Color 

 light olive; a metallic vertebral band; sides and belly silvery; no lateral 

 hand; a black spot at base of caudal; muzzle dusky; membrane of 

 upper posterior part of dorsal fin black. Head 4; depth 5. D. 8; A. 

 8; scales S-5G-4; teeth 4-4. L. 4 inches. Tennessee Kiver. 



(Cope, Journ. Aead. Nat, Sci. Phila. t~07, -J-J7.) 



93. COUESIUS Jordan. 



(Jordan, Bull. Ilayden's Gcol. Surv. Terr, iv, 7e>5, 1878: type Nocomis milneri Jordan = 



/,> ttcHxviiiux diNximilis Grd.) 



iJody elongate. Head normal, not depressed, the profile convex. 

 Mouth terminal, normal, a well-developed barbel at the posterior end 

 of the maxillary. Teeth _?, 4-4, 2, hooked, without grinding surface. 

 Scales rather small. Lateral line continuous. Dorsal fin over or 

 slightly behind ventrals; anal basis short Size rather large. (Dedi- 

 cated to Elliott Coues.) 



* Scales sinall, 00-70 in the course >]' the lateral line. 



t About thirty scales in a transverse series from dorsal to ventrals. 



341. C. squamileiitiis (Cope) Jor. 



Form stout, profile nearly plain. Muzzle not prominent. Mouth 

 horizontal, the maxillary not reaching the orbit. Eye rather small, 4~ 

 in head, shorter than snout. Isthmus wide. Barbel oolite small. Dor- 

 sal tin slightly in advance ol' ventrals, behind middle of the body. 

 Scales quite small. Olivaceous above; sides silvery; a lateral band of 

 dark punctulations. Fins plain. Head :!.',; depth 5. D. 8; A. 7; scales 

 17-GG-14; teeth L', 11, 1. Henry's Fork of Green River, Wyoming. 



[C"i 



(Ceratiohthys squamilentua Copo, Haydi : rv. Wyom. 1*70, l-l-J, 1872.) 



HAbont 20 scales in a trans' rpun d.. : .utral.H. 



342. <:. dissimilis (Grd.) Jor. 



Form of ^i /itottluN ct-j>o/-<ilix, but more elongate and le>s compressed. 

 Head ll.itti.-h above, ihe snout broad, ])rojert in- over the large, oblique 

 mouth, maxillary reaching front of e.\ e. liai'hcl \fi\ t -vident. Kye. 

 large, as long as snout, a hout I in head, 1 A in interorbilal space. Scales 

 small, crov, tied foi u ;inU. t IIO.M -.in I he l)aek smaller. Dorsal lia begin- 

 ning o\ (! 1,M ray of \entrals. I>usk\ above; .sides somewhat silvery; 



in obscure dusky band through ej .nixi,oiit; lins plain. IIead4^; 



