Jordan and Evermann. Fishes of North America. 247 



388. RUTILU8 BOUCARDI (Glinther). 



Head 4; depth 4; eye moderate, 4^. D.8; A. 9 or 10; scales 7-39-5; 

 teeth 5-4, hooked. Body moderately elongate. Head thick, obtuse; 

 mouth broad, its cleft not extending to the eye ; snout convex, the lower 

 jaw included. Caudal fin moderately forked. Origin of dorsal fin close 

 behind that of the ventrals. Pectorals not reaching nearly to ventrals. 

 Brownish ; a bluish lateral band, forming a faint caudal spot. Length 3| 

 inches. Cuernavaca, Mexico. (Giinther.) ( Named for Alphonse Boucard, 

 an ornithologist who collected largely in Mexico.) 



/.?/(/ >is boucardi, GVNTHEH, Cat., vn, 485, 1868, Cuernavaca, Mexico. (Coll. Boucard.) 

 Leuctts boucardi, JORDAN & GILBERT, Synopsis, 246, 1883. 



118. LUXILINUS, Jordan. 



Lnxilinus, JORDAN, Catalogue Fishes N. A., 1885, 33, (occidentals). 



Body oblong, strongly compressed. Ventral edge of moderate width; 

 scaled over and not at all carinated; otherwise much as in Abramis. No 

 barbels. Gill rakers slender, of moderate length. Teeth 5-5, with entire 

 edges and well-developed grinding surface, their tips little hooked. Intes- 

 tines of the short type, but longer than in most related genera; anal basis 

 elongate. This genus seems nearest related to Abramis or to its section 

 Notemigonus, but in its technical characters it stands near Eutilus. One 

 species known. (Name, a diminutive of Luxilus', from lux, light.) 



389. LUXILINUS OCCIDENTALS (Baird & Girard). 



Dorsal 10 ; A. 11 ; eye large, 4. Body moderately elongate ; snout sub- 

 conical, rather tapering. Mouth oblique, the maxillary not reaching 

 orbit. Brownish above ; sides silvery ; more or less speckled with gray. 

 San Joaquin Valley, California ; not rare about Fresno, (occidentalis, 

 western.) 



Leucosomus occidentals, BAIRD & GIRARD, Proc. Ac. Nat. Sci. Phila., 1854, 137, Poso Creek; Four 



Creeks, tributaries of Tulare Lake, California. (Type, No. 57. Coll. Heermann.) 

 Liiriln* occidentalis, GIRARD, Pac. R. R. Surv., x, 280, 1858. 

 Abramis occidentalis, GUNTHER, Cat., vu, 305, 1868. 

 Notemigomis occidentalis, JOKDAN & GILBERT, Synopsis, 250, 1883. 



119. OPSOPCEODUS, Hay. 



Opsopccodus, HAT, Proc. U. S. Nat. Mus., 1880, 507, (emilise). 



Trycherodon, FORBES, in JORDAN & GILBERT, Synopsis, 247, 1883, (megalops). 



Opsopcea, JORDAN & EVERMANN, new submenus (bollmani). 



Mouth very small, terminal. Body fusiform. Upper jaw protractile; 

 no barbels. Teeth 5-5 or 4-5, with little or no grinding surface and with 

 serrated edges, the tip strongly hooked. Abdomen not compressed. Dor- 

 sal nearly over ventrals. Anal basis short. Lateral line complete, or 

 more or less imperfect. Intestinal canal short. Peritoneum white. Sin- 

 gular fishes, of small size, confined to Eastern America, (bxonoitu, to feed 

 daintily; dovs, tooth.) 



OPBOP<EODUS : 



a. Mouth very oblique, terminal, its cleft almost vertical ; no distinct caudal spot. 

 6. Lateral line complete, or very nearly so. 



c. Dorsal fin plain, without distinct dark markings; head very slender. OSCULUS, 390. 



