Jordan and Evermann. Fishes of North America. 245 



dusky shaded; scales with some brown dots, but not profusely dusted 

 with black specks as in the preceding species. Length 8 inches. Lakes 

 of southeastern Oregon (Klamath, Warner, Goose, etc.), the old Lake 

 Idaho; locally abundant ; .not found in Lake Lahontau, Lake Bonneville, 

 nor in the Sacramento Valley. Very distinct from R. symmetricus, the 

 scales larger, the color less opaque. It is, however, close to Rutilus oliva- 

 m/*, in appearance, but is more slender and has larger scales, besides the 

 difference in the teeth, (bicolor, two-colored.) 



Aljanxei MWor,* GIRARP, Proc. Ac. Nat. Sci. Phila., 1856, 183, Klamath Lake. (Type, No. 



2750. Coll. Dr. J. S. Newberry.) 

 f Al<i<ni*t'(t miticarf COPE, Proc. Ac. Nat. Sci. Phila., 1864, 282, "Texas;" JORDAN, Proc. U. S. 



Nat. :Mus., 1885, 121. 



Myloleitcus tlutl<tssiitns,i COPE, Proc. Ac. Nat. Sci. Phila., 1883, 143, Goose Lake, Oregon. 

 CettcucM btcotor, G&NTHIK, Cat., vir, 245, 1868. 

 /,<>,'.,< bicolor, JORDAN & HEXSIIAW, /. c., 193, 1878. 

 l.vn,->is bicolor, JORDAN & GILBERT, Synopsis, 246, 1883. 

 LCHCIIS uuticus, JORDAN & GILBERT, Synopsis, 246, 1883. 



387. RUTILUS SYMMETRICUS (Baird & Girard). 



Head 3| ; depth 4 ; eye 3 to 4. D. 8 ; A. 8 ; scales 10 to 14-52 to 67-5, 

 extremely variable, usually 53 to 56; teeth 5-4. Body rather elongate, 

 moderately compressed, not elevated. Head short, rather slender ; mouth 

 small, little oblique, the lower jaw included. Eye large, anterior ; snout 

 usually a little convex, a little- longer than eye; mouth not quite terminal. 

 Lateral line strongly decurved. Dorsal distinctly behind ventrals. Col- 

 oration, dusky above, sides pale, scales more or less dotted with black; 

 bright-colored specimens have a dark lateral band from snout to middle 

 of caudal, a second dark band or series of spots below lateral line ceasing 

 at vent ; axils orange ; cheeks silvery. Color much brighter in specimens 

 from clear brooks (as Tree Pinos Creek, San Benito County, California). 

 Length 5 inches. Rivers of California and Nevada, probably generally 

 distributed. Originally known from the San Joaquin and Merced 

 rivers and Kern Lake. It is also very common in streams of the coast 

 ranges from San Francisco to Salinas River, being in the brooks of Santa 

 Clara Valley the most abundant fish. Other specimens corresponding 

 rather to obesus occur in streams tributary to Owen Lake, Mohave River, 

 Washoe Lake, Truckee River, Humboldt River, etc., (the basin of the 

 Quaternary Lake Lahontan.). Still other records are from western and 

 northern Utah, in the Lake Bonneville basin. If three species are con- 

 founded under the name symmetricus, they are likely to be symmetricus 

 (=formo8us), from streams west of the Sierra Nevada, obesus from the basin 



*The following notes have been made on the types of Algansea bicolor : Length 7 inches ; head 

 4, deptli 4X>; eye 4% in head. Eye shorter than snout ; snout pointed ; maxillary not reaching 

 eye. Lower jaw little projecting. D. 9 ; A. 8; scales 9-48-6. Scales larger than in types of 

 obesa, from which it is distinct. 



f A specimen from unknown locality has been described as Algansea antica, COPE: Head acute, 

 subconic; snout rather pointed; insertion of dorsal midway between pupil and base of caudal. 

 Jlouth small, the jaws equal; maxillary 4 in head, not reaching orbit. Lateral lino decurved. 

 Caudal short, little forked; pectoral short, not reaching ventrals. Eye 5 in head. Purplish 

 f-latc above, yellow below; sides of head and edgee of scales punctulate. Head 3g; depth 3g; 

 1). 8; A. 8 ; scales 10-49-6 ; teeth 4-5, little hooked, with a very broad grinding surface. Length 

 ft inches. "Texas;" here described from the original type, its exact origin, unknown, very 

 likely not from Texas. It is probably identical with It. limlor or K. symmetric**. 



lRnlilnxtlnila**iiHi possesses the following characters: Slenderer than R. parovaniu, the color 

 a light translucent green, quite unlike the heavy olivaceous of the latter. Head 3%; depth 4>; 

 A. 9; scales 9-46-4; teeth 4-5. Length 6 inches. Onejpecimen known, from Goose Lake, Oregon, 

 probably identical with It, bicolor. 



