128 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY — IV. 



but ratlier sparse papillne. Scales 12-74-10. Dorsal fin short, higher 

 than long, of abont 11 rays. Color dark above; sides clouded with 

 black aad yellow. Klamath Lake, Oregon. A little-known species. 

 (Ayres, Proc. Acad. Nat. Sci. Cal. 1855, 32; Jordan, 1. c. 173.) 



136. C. MiacrocEaiBMS Grd. — ColumUa Biver Suclcer. 



Bod}^ heavy forwards. Head large and heavy, convex. Snout blunt, 

 much overlapping the horizontal mouth. Mouth quite large, with very 

 large lips, the upper full and pendent, with 6-8 rows of strong pa- 

 X)illi3B. Head large, 4^ in length, rather narrow, quadrangular, the 

 snout projecting. Eye large. Dorsal fin much longer than higli, its 

 rays about 15. Pectorals long and narrow •, caudal well forked. Head 

 4 in length. Scales 12-72-10. Coloration rather dark ; a dusky lateral 

 stripe; below abruptly j>ale. Columbia Eiver. 



(Girard, Proc. Acad. Nat. Sci. PMla. 1856, 175 ; Jordan, 1. c. 171.) 



137. C occideaataBas Ayres.— Sacramento Suclcer. 



Body rather slender, little elevated. Mouth comparatively small, 

 smaller than in C commersoni ; the upper lip with 5 or G rows of smallish 

 pai^illse; lips rather thin. Head quite small, rounded above, 4^ in 

 length, the i^rofile steeper than in C. commersoni^ the snout more 

 pointed, the two sides of the head more convergent forwards. Eye 

 small. Dorsal fin longer than high, its rays 12-14 ; caudal well forked, 

 the upper lobe the longer. Scales 13-75-10. Dark above, gradually 

 paler below. Streams of California ; abundant in the Sacramento and 

 San Joaquin. 



(Ayres, Proc. Cal. Acad. Nat. Hist. 1854, 18; Jordan, ]. c. 172.) 



13§. C. toeri8ar(flaMi Girard. 



Color blackish. Fins rather high. Lateral line with 80 scales (ac- 

 cording to the figure). Eye large. Head 5 in length. Mouth small, 

 with broad lips. Rio Huagui, Mexico, west of the Sierra Madre. {Girard.) 

 This species is, perhaps, allied to C. occidentalism but may heaPantosteiis. 



(Girard, Proc. Acad. Nat. Sci. PMla. 1856, 175.) 

 ec. Lateral line witli 60-65 scales. 



139. C. ardesis Jor. & Gills. 



Body rather elongate, little compressed, the back broad. Head 

 broad, conical. Mouth entirely inferior, the mandible horizontal ; upper 

 lip very wide, full, pendent with about 8 rows of coarse, irregular papillae; 

 lower lip very broad, coarsely papillose, cut to the base by a sharp in- 

 cision. Eye very small, 7 in head, 3J in interorbital width. Dorsal fin 

 long and low, its anterior rays three-fourths the base of the fin, half 



