Jordan and Evermann. — Fishes of North America. 247 



388. RL'TILUS BOUCARDI (Gunther). 



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

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

 mouth broad, its cleft uot 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 3i 

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

 an ornithologist who collected largely in Mexico.) 



Letwi.icns boncardi, Gi'NTHER, Cat., vii, 485, 1868, Cuernavaca, Mexico. (Coll. lioucard.) 

 Leucus boucanli, Jordan & Gilbert, Synopsis, 246, 1883. 



ii8. LUXILINUS, Jordan. 



LuxiUntis, Jordan, Catalogue Fishes N. A., 1885, 33, {occidentalis). 



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

 scaled over and not at all carinated; otherwise much as in Ahramis. 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 Ahramis 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. LrXILINUS OCCIDENTALIS (Baiid & 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.) 



Leticosomus occidentalis, Baird & Girard, Proc. Ac. Nat. Sci. Phila., 1854, 137, Poso Creek; Four 



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

 Luxihis occidental is, Girard, Pac. R. R. Surv., x, 280, 1858. 

 Abi-amis occidentalis, Gunther, Cat., vii, 305, 18G8. 

 Notemigonm occidentalis, Jordan & Gilbert, Synopsis, 250, 1883. 



119. OPSOPOEODUS, Hay. 



Opsopoeodus, Hay, Proc. U. S. Nat. Mus., 1880, 507, (emilise). 



IVycherodon, Forbes, in Jordan & Gilbert, Synopsis, 247, 1883, {meyalops). 



Opsopoea, Jordan & Evermann, new subfrenus {bolbnani). 



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, (uxoirotiu, to feed 

 daintily; dovg, tooth.) 



Op60P(EOdus : 

 o. 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. 



