Jordan and Rvcrmann. Fishes of North America. 181 



of papilla 1 ; lower lip moderate, divided by a broad notch, each lobe with 

 about 6 rows of papillae. Eye a little behind middle of head. Dorsal 

 shorter and higher than in C. ardens. First ray of dorsal twice height of 

 the last, its length greater than that of the base of the fin; caudal forked, 

 the lower lobe longest; pectorals long; anal high. Dusky above, pale 

 below. L. a foot. Utah lake, rather scarce, and not yet seen elsewhere. 

 This species resembles Chasmistes Horns, (fecundm, fertile, in allusion to 

 its supposed abundance, but the "fecund" species which has made Utah 

 Lake the "greatest sucker pond in the world" is really C. ardens.) 

 Catostcmiu fectauhu, COPE & YARROW, Zool. Wheeler Survey, v, 678, 187G, Utah Lake; JORDAN 



& GiLBF.iiT, Proc. IT. S. Nat. Mus., 1880, 463; JORDAN & GILBERT, Synopsis, 12ft, 1883 ; JORDAN, 



Bull. U. S. Fish Com., 1889, 31. (Type, No. 16930.) 



Subgenus HYPENTELIUM, Rafinesque. 



294. CATOSTOMUS NIGRICANS, Le Sueur. 



(Hoo SUCKER; STONR ROLLER; TOTER; CRAWL-A -BOTTOM; HAMMER HEAD; STONE LUGGER; 



HOG MOLLY.) 



D. 10 or 11 ; V. 9. Lat. line 48 to 55, 12 to 15 scales in a cross series. 

 Deph 4 to 5 in length; head 4 to 4. Eye rather small, 4| to 5 in head. 

 Head flattened above, transversely concave between orbits, the frontal 

 bone thick, broad, and short, the physiognomy being therefore peculiar. 

 Upper lip very thick, strongly papillose, with a broad free margin, which 

 has upward of 8 to 10 series of papilla} upon it; lower lip greatly devel- 

 oped, strongly papillose, considerably incised behind, but less so than in 

 Catostomus proper. Fontanelle shorter and smaller than in C. commersonii. 

 Pectoral fins unusually larger. Color olivaceous; sides with brassy 

 luster; belly white; back brown, with several dark cross blotches, irregu- 

 larly arranged, these becoming obsolete in old individuals; lower fins 

 dull red, with some dusky shading; young considerably variegated, the 

 sides spotted. Size large; length about 2 feet. New York to Minnesota 

 and Kansas, Arkansas, and the Carolinas; abundant in swift or rocky 

 streams, which it ascends to spawn; never found in muddy or warm 

 waters; less tenacious of life than the other species of Catostomus. 

 (nigricans, blackish.) 



Caiostomns nigricans, LE SUEUR, Jour. Ac. Nat. Sci. Phila., 1817, 102, Lake Erie; GONTHKR, 

 Cat., vn, 17,18G8; JORDAN, I. c., 162,1878; JORDAN & GILBERT, Synopsis, 130,1883. 



jriiloiiiyzon nigricans, AGASSIZ, Am. Jour. Sci. Arts, 1855, 205. 



Caiostonms macu?os?<s, LE SUEUR, I. c., 103,1817, Pipe Creek, Maryland. 



Hypenlelium macropternm, RAFINESQUE, Jour. Ac. Nat. Sci. Phila., I, 1817, 420, Ohio River. 



Catoatnmm xanlhopus, RAFINESQUE, Ich. Oh., 57, 1820, Ohio River. 



Catostomns planiceps, CUVIER & VALENCIENNES, xvii, 450, 1844, Wabash River. 



Catostomus nigricans etowanus, JORDAN, Ann. Lye. Nat. Hist. N. Y., 1877, 345, Etowah River, 

 Rome, Ga. ; a brightly colored variety from the Alabama basin. 



Caionlomiis megastomns, RAFINESQUE, Ich. Oh., 59, 1820; based on an incorrect drawing; belongs 

 here if anywhere. 



295. CATOSTOMUS RHOTHCECUS, Thoburn. 



Head 5 ; depth 5. D. 11 ; A. 8 or 9. Scales 7-48-5, 19 rows in front of 

 dorsal. Allied to Catostomus nigricans but with much smaller head, which 

 is less depressed between eyes. Head very small, flattened above but not 



