246 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 



410. 1.. bicolor (Gnl.) Jor. 



Body moderately stout. Head rather heavy, the muzzle very short 

 aud couical. Mouth moderate, very oblique, the jaws equal, the max- 

 illary reaching line of eye. Scales rather large. Lateral line decurved. 

 Eye rather large, 4^ in head. Color transparent, olivaceous; a distinct 

 XJlumbeous lateral band. Fins dusky-shaded. Scales with some brown 

 dots, but not profusely dusted with black specks as in the two preceding 

 species. Head 3|; depth 3f. D. 8; A. 7; scales 8-50-5 (11-48-5, Coj^e); 

 teeth 4-5. L. 5 inches. Steams of Oregon, Nevada, etc. 



(Algansea bicolor Girard, Proc. Acad. Nat. Sci. PJiila. 1856, 183: Leuciscus bicolor 

 Giiuther, vii, 245: Myloleucus parovanus Cope, Zool. Wheeler's Expl. W. 100th Mer. v, 

 669; Jordan &. Hcushaw, 1. c. 193.) 



411. Ij. anticus (Cope) Jor. & Gilb. 



" Nearest to the foDiiosus of Girard, but differs in the much more pos- 

 terior position of the fins. In this the anterior base of the dorsal is 

 equidistant between end of muzzle and base of tail ; in anticus much 

 behind the median point. The ventral s are much nearer the caudal 

 than the chin; in theformosns the reverse is the case." Body moderate, 

 shortened behind. Caudal peduncle short, thick. Caudal fin short, 

 little forked. Mouth oblique, muzzle not reaching line of orbit. Eye 

 5 in head. Profile long, flat, descending ; dorsal outline arched. Pur- 

 plish slate above, yellow below; sides of head and edges of scales punc- 

 tulate. Head 3|. D. 8; A. 8; scales 10-50-G; teeth not described. L. 

 5 inches. Texas. (Cope.) 



(Alj/ansea antica Cope, Proc. Acad. Nat. Sci. Phila. 1864,282.) 



412. L.. Itoucardi (Giiuther) Jor. &. Gilb. 



Body moderately elongate. Head thick, obtuse. Mouth broad, its 

 cleft not extending to the eye. Snout convex, the lower jaw included. 

 Eye moderate, 4i in head. Caudal fin moderately forked. Origin of 

 dorsal fin close behind that of the ventrals . Brownish; a bluish lateral 

 band, forming a faint caudal spot. Head 4 ; depth 4. D. 8; A. 9; scales 

 C-39-4 ; teeth 5-4. L. 3J inchei. Cuernavaca, Mexico. {Gunther.) 



{Leuciscus boucardi Giinthei-, vii, 485.) 



105.— ©PSOPfiKODUS Hay. 



(Hay, Proc. TI. S. Nat. Mus. 1880, 507: type Opsojxvodiis emilia': Hay.) 



Form of Hi/bognathus. Mouth very small, almost vertical, its position 

 entirely anterior, with scarcely any lateral cleft. Teeth 5-5, with grind- 

 ing surface and serrated edges. Abdomen not compressed. Dorsal 



