186 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY III. 



Genus CYCLEPTUS Ilajincniic. 



Cychptiis Rakinksql'e, Journal do riij-siqno, dc Cliiuiic ut d'Histoire Naturello, Paris, 



l«I9,p. 421. 

 liltytiduslomus Hkckkl, Fische Syrieus, Russegger's Reisen, 1842, p. 1023. 

 Catoslomus et Sdcrognathus sp. AuCT. 



Type, Cych'piuB vigreacena Rafinesque, ^ Catostomus iJoikjuIuh Le Sueur. 

 Etymology, /ci'/cXof, round; Aenrdf, small. "The name meaus small, round nioutb" 

 {Itafincsque). 



Head very small, short and slender, its lenijtli contained G to 7 times 

 in that of the body, its upper surlaee rounded; eye quite small, nearly 

 median, not very high up, its length G to 8 in that of the side of the 

 bead; suborbital bones rather small and quite narrow; fontanelle en- 

 tirely obliterated by the union of the parietal bones. 



Mouth small, entirely inferior, overlapped by the projecting snout, 

 the upper lip thick, pendent, covered with 3 to 5 rows of tubercles, the 

 outer quite large, the inner small; lower lip moderate, formed some- 



ably abort, extending little more tban balf way to vent, originating under posterior 

 tbird of dorsal. Pectorals well separated. Istbmus wido. 



"Color above blackisli, witb a strong inferior marginal sbadc on tbo lower part of tbe 

 sides, and the ligbter tint above ; a brown spot just above axilla, is cut oil" from il by 

 a band of tbe yellow color which covers the belly and bead below. 



" The only species concerning which any doubt can arise in tbe nomenclature of this 

 one is C. bernardini of Girard. That writer states tbat the latter possesses 15 D. radii ; 

 this, with the ascription of a .slender form and other peculiarities, will always sepa- 

 rate them. Three species in Professor Haydeu's collection without locality. This 

 should be probably a tributary of Green River." — (Copk, Haydcn'n Giol. Sitrv. Tvrr. 

 1872, p. 436.) 



Mixo.MUS BARDUS Cope. — "This species is distinguished by its very short head, and 

 marked coloration, resembling in that respect the C. giizmaiiivusis of Girard ; with this 

 species, it has, bowever, nothing else in common. 



"Head wide, muzzle not projecting beyond upper lij); latter not jiendent, with nar- 

 row, smooth commissure and three or four rows of tuberclts. Lower lip deeply incised, 

 tubercular to near inner edge. Eye 5.25 times in length of head, twice in inter- 

 orbital width. Head five times to end of basal caudal scales. Form stout : body cylin- 

 dric anteriorly. Dorsal tin nearer end of niuzzle than end of caudal scales. Scales of 

 bodysubetiual, in thirty longitudinal rows between dorsal and ventral fins, latter orig- 

 inating beneath hinder border of dorsal, not quite reacliing vent. Pectorals well sepa- 

 rate; isthmus wide, narrower than in .1/. dilphinus. Color blackish above, a broad 

 olive b.md from upper part of opercular border along upper half of caudal peduncle, 

 and a bread black band below, narrowing to a line along the middle of tbo peduncle; 

 below, yellowisii, a band of the same cutting oil' a blackish area above the axilla, as 

 in tbe last species." — (Con:, Uaifden'a Gcol. Surv. Tirr. 1872, p. 4:u;.) 



