128 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY — IV. 
but ratlier sparse papillie. Scales 12-74-10. Dorsal fin short, higher 
than long, of about 11 rays. Color dark above; sides clouded with 
black and yellow. Klamath Lake, Oregon. A little-known species. 
(Aj'res, Proc. Acad. Nat. Sci. Cal. 1855, 32; Jordan, 1. c. 173.) 
136. C. macrocEiiBcis Grd . — CohmUa Itiver Sucker. 
Body heavy forwards. Head large and heavj", convex. So out blunt, 
much overlapping the horizontal mouth. Mouth quite large, with very 
large lips, the ui^per full and pendent, with 6-8 rows of strong pa- 
pillae. Head large, 4^ in length, rather narrow, quadrangular, the 
snout projecting. Eye large. Dorsal fin much longer than high, 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 irile. Columbia Eiver. 
(Gir.ard, Proc. Acad. Nat. Sci. Phila. 1856, 175; Jordan, 1. c. 171.) 
137. C. ©ccadeBalaBas Ayres. —Nacrame?)^ Sucker. 
Body rather slender, little elevated. Mouth comparatively small, 
smaller than in C. commersoni ; the upper lip with 5 or G rows of smallish 
papillae; lips rather thin. Head quite small, rounded above, 4.^ in 
length, the profile 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 Sticramento and 
San Joaquin. 
(Ayres, Proc. Cal. Acad. Nat. Hist. 1854, 18; Jordan, 1. c. 172.) 
13§. C. Ejcraiardisai Girard. 
Color blackish. Fins rather high. Lateral line with 80 scales (ac- 
cording to the figure). E^’e large. Head 5 in length. Mouth small, 
with broad lips. Eio Huagui, Mexico, west of the Sierra Madre. {Girard. ) 
This species is, perhaps, allied to G. occidentalism but may hQuBantosteus. 
(Girard, Proc. xicad. Nat. Sci. Phila. 1856, 175.) 
ec. Lateral line with 60-65 scales. 
139. C. arelcEiS Jor. & Gilb. 
Body rather elongate, little compressed, the back broad. Head 
broad, conical. Mouth entirely inferior, the mandible horizontal ; upper 
lip very wide, full, iiendent with about 8 rows of coarse, irregular impillie; 
lower lip very broad, coarsely iiapillose, cut to the base by a sharp iu- 
ci.sion. E^'e very small, 7 in head, 3^ in interorbital width. Dorsal fin 
long and low, its anterior rays three-fourths the base of the fin, half 
