160 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 



melanofus Raf. IchtL. Oil. 58: Hiihorhynclius pcrspicuus Grd. Proc. Acad. Nat. Sci. Pbila. 

 1856, 185: nijhognathus perspicnus Giintber, vii, 185.) 



** Angle of month with a minnte, thickish barbel. 



194. H. supercilaosMS Cope. 



Head broader, more ridged above. Caudal and anal fins more dusky ; 

 otherwise like tbe last, from which it may be distinguished only by the 

 presence of the small barbel. With the last, equally widely distrib- 

 uted, and even more abundant. Probably a variety. 



(Cope, Jonrn. Acad. Nat. Sci. riiila. 1868, 234: Jordan, 289.) 



81.— EXOGILOSSUITI Rafiuesque. 



Cutlips. 



(Rafine.sque, Jonrn. Acad. Nat. Sci. Pbila. i, 420, 1818: type ExogJossum lesnetmanum 

 'Ra,f.-^Cy2)rinus maxiUingua Le S.) 



Body moderately elongate, little compressed. Mouth peculiar, the 

 mandible being contracted and incurved, its outline strongly three- 

 lobed. This appearance is due to the fact that the dentary bones lie close 

 together, parallel, and are united throughout their length, instead of 

 forming a broad arch, as in all other Cyprinoid fishes. The lower lip is 

 represented by a broad fleshy lobe on each side of the mandible. Up- 

 per jaw not protractile. Upper lip thick, somewhat plicate. Pharyn- 

 geal bones small. The teeth hooked, without grinding surface, 1, 4-4, 1. 

 Scales moderate. Lateral line complete. Fins without spines. Dorsal 

 slightly behind ventrals. Anal rays 7-8. Isthmus broad. Gill-rakers 

 weak. Pseudobranchite i)resent. Air-bladder normal. Alimentary 

 canal short; i)eritoneum white. Size moderate. One of the most 

 strongly marked genera of Cyprinidw, with a single species, (i'^w, out- 

 side; yXwTffa, tongue.) 



195. E. iiB^xalSaBB??ull (Le Snenr) Haldeman. — Cut-lips; Stone-ioier. 



Body rather stout, little compressed. Head large, broad and flattish 

 above, with tumid cheeks. Mouth moderate, slightly oblique, the end 

 of the maxillary not reaching the line of the orbit. Upper jaw longer 

 than lower. Scales rather crowded anteriorly, those in front of the 

 dorsal small. Color olivaceous; smoky or dark above; a blackish bar 

 behind opercle, and a dusky shade at the root of the caudal in the 

 young; fins unmarked. Head 4; depth 4i. D. 8; x\. 7; scales 8-53-5; 

 teeth 1, 4-4, 1. L. C inches. Western New York to Virginia; abun- 

 dant in the Susquehanna Basin, but not widely distributed. One of the 

 most singular of the Cyprinidcv, distiuguished at sight by its three- 

 lobed lower jaw. 



{Cyprituis maxilliiigua Le Suenr, Jonrn. Acad. Nat. Sci. Pbila. i, 85; Giintber, vii, 

 188; Jordan, 308; Cope, Cypr. Peuu. 1866,360.) 



