Jordan and Evermann. Fishes of North America. 2791 



about 12 rows of short, thick papillre, posteriorly quite small; distance 

 from front of upper lip to back of lower 1 in snout; jaws with a slight 

 cartilaginous sheath ; width of preorbital a little less than \ its length. 

 Reaches a length of about 2 feet. Lower Colorado River basin. This 

 description by Gilbert tfc Scofield, based upon specimens from the Gila 

 River at Tempe, Arizona. 



279(a). CATOSTOMUS DISCOBOLUS, Cope. 



Head 3- to 4; depth about 5J; eye small, high up, 5 to 6 in head, 2% 

 in snout, 2f in interorbital width, which is 8^ in head ; width of preorbital 

 less than its length ; least depth of caudal peduncle 2| in its length, or 

 2 in head ; greatest depth of head If in its length ; depth from lower edge 

 of orbit 3J in head. D. 12 or 13; A. 7; scales 19 to 21-101 to 109-17 to 21, 

 52 to 63 in front of dorsal. Muzzle projecting slightly beyond upper lip. 

 Upper margin of dorsal very slightly concave, the length of its base 1| 

 in its longest ray, or 1J in head; last dorsal ray 4 length of first; origin 

 of dorsal midway between tip of snout and base of caudal; ventral 

 rounded, If in head, not quite reaching vent. Mouth as in C. latipinnis 

 except that the posterior tubercles on lower lip are long and not nearly 

 so closely set, there being 9 or 10 rows; jaws with a slight cartilaginous 

 pellicle. Upper portion of the Colorado River basin. Attains the length 

 of a foot or more. The above description by Gilbert & Scofield from spe- 

 cimens from Green River at Green River Station, Wyoming. 



Catostomus discobolus, COPE, Hayden's Geol. Surv. Wyo., 435, 1870, Green River, Wyo- 

 ming ; GILBERT & SCOFIELD, Proc. TJ. S. Nat. Mus. 1898, 490. 



Page 175. After Catostomus griseus add: 



280(a). CATOSTOMUS RETBOPINNIS, Jordan. 



A doubtful species which is, however, not yet shown to be invalid. 

 Head 4; depth 5; eye 6f in head; snout 2; interorbital 2|. D. 11; A. 7; 

 scales 17-108-14. Body slender, head slender, snout very long, caudal 

 peduncle long, its least depth less than snout, 2| in head; dorsal profile 

 very little elevated ; mouth large, wholly inferior j overhung by the pig- 

 like projecting snout ; lips thin but very broad, lower lip incised nearly 

 to base, with about 6 rows of moderate papilla ; lobes of lower lip very 

 long, about i of snout ; gill rakers short and weak. Origin of dorsal a 

 little nearer base of caudal than tip of snout; base of dorsal equal to 

 snout ; longest dorsal ray a little greater than base of fin ; anal fin long 

 and pointed, the fourth ray longest, l-^ in head ; caudal lunate, the middle 

 ray 1|- in outer rays; pectoral somewhat falcate, the longest 1 in head; 

 ventrals rather short, not reaching vent by more than an eye's diameter. 

 Length 14 inches. 



Catostomus retropinnis, JORDAN, Bull. IT. S. Nat. Mus., xn, 178, 1878, Milk River, 

 Montana. (Type, No. 21197. Coll. Dr. Elliott Coues.) 



