180 Bulletin 47, United States National Museum. 



wide, full, pendant, with 4 to 8 rows of coarse, irregular papillae, lower 

 lip very broad, coarsely papillose, cut to the base by a sharp incision. 

 Eye small, 7 in head, 3 in interorbital width ; snout 2 in head. Dorsal 

 fin long and low, its anterior rays i longer than the last rays ; pectorals 

 and ventrals short; caudal short; anal long. Pharyngeal bones rather 

 weak, with smallish teeth. Blackish above; males with the sides rosy; 

 fins dark. L. 18 inches. Close to C. commersonii, differing chiefly in the 

 rather larger mouth and lips. Lakes and streams of great basin of Utah, 

 swarming in myriads in Utah Lake. Also abundant in upper waters of 

 Snake River in Idaho. In Heart Lake, in the Yellowstone Park, it is 

 infested by a very large parasitic worm (Ligula catostomi, Linton), larger 

 than its own viscera, (ardens, burning, from the red shades of the male.) 

 Catostomus ardens, JORDAN & GILBERT, Proc. U. S. Nat. Mus., 1880, 464, Utah Lake, Prove; JOR- 

 DAN & GILBERT, Synopsis, 128; JORDAN, Bull. U. S. Fish Coin., 1889, 65, 77, etc; LINTON, 

 Bull. U. S. Fish Com., 1889, 66. (Type, No. 27363.) 



291. CATOSTOMUS GILA, Kirsch. 



Head 4$; depth 4|. D. 11 or 12. Scales 11-58 to 60-10. Close to C. 

 ardens, but the nape lower, the tail shorter. Dorsal shorter and higher, 

 its longest ray nearly twice the last, and longer than base of fin; free 

 margin incised. Snout 2J in head; eye small ; lips large, the upper with 

 4 rows of papillae, the lower split nearly to base. L. 14 inches. Dark 

 brown, scales darker at base. Rio Gila. 



Catostomus gila, KIRSCH, Proc. U. S. Nat. Mus., 1888, 555, Rio Gila, Fort Thomas, Arizona. 



292. CATOSTOMUS INSIGNIS, Baird & Girard. 



Body rather elongate, subterete, heavy at the shoulders, tapering back- 

 ward, the depth about 5 in length. Head moderate, about 4^ in length. 

 Fontanelle rather small ; mouth comparatively small; lips moderate, the 

 upper narrow, with several rows of large tubercles; no sheaths on jaws. 

 Scales subequal, about 56 in the lateral line, 19 in a cross series, 27 before 

 dorsal; scales on back large, those on belly small. A series of dusky spots 

 along each row of scales; the spots often obscure. D. 11. Very close to 

 C. commersonii, the scales less crowded, the upper lip broader, the color 

 somewhat different. Gila basin ; not rare, (insignia, notable.) 



Catostomus insignis, BAIED & GIRARD, Proc. Ac. Nat. Sci. Phila., 1854, 28, Rio San Pedro, 

 Arizona ; COPE & YARROW, Wheeler Survey, Zool., v, 676, 1876; JORDAN, I. c., 165,1878 ; 

 JORDAN & GILBERT, Synopsis, 130, 1883. (Type, No. 169.) 



293. CATOSTOMUS FECUNDUS, Cope & Yarrow. 

 (WEBUQ SUCKER.) 



Head 4 ; depth 4|. D. 11 or 12 ; A. 7 ; V. 9. Scales 8-64-8. Body mod- 

 erately stout, little compressed, the tail slender. Head subconic, the 

 profile decurved from the nape to the base of the premaxillary spines, 

 which abruptly protrude, forming a distinct "nose," as in Chasmistes 

 liorus; premaxillaries in front scarcely below the preorbital. Mandible 

 large, oblique, placed at an angle of 30 when the mouth is closed, its 

 length 2 in head. Upper lip full, pendant, smoothish, with about 4 rows 



