31. CYPRINID^ — PHENACOBIUS. 205 



88.— PHEIVACOBIUS Copo. 



( Sorridhnn C,n]w. ) 

 (Cope, Fior. Acad. Nut. Soi. Fhil.a. l.fSi>7, 9(5 : type I'htmaonhmn feretulus Copo.) 



Body elongate, little compres.sed. Mouth inferior, the lower lip thin 

 mesiiilly, but enlarged into a fleshy lobe on each side toward the angle 

 of the mouth, thus presenting a superficial resemblance to that of Exo- 

 glofisum, with which the genius has probably real affinities; upi)er li^) 

 with a callous covering within; dentary bones distinct, except at sym- 

 physis. Xo barbel. Upper jaw protractile. Teeth 4-4, hooked, with- 

 out grinding surface. Scales rather small. Lateral line couii)lete. 

 Dor.sal fin in front of ventrals ; anal basis short. Isthmus extremely 

 wide. Intestines short; peritoneum white. Small species, with the 

 aspect of young suckers. {(piva'=, deceptive ; ,ii<>q^ life ; the appearance 

 of the fish suggesting an herbivorous species with long intestines, \^ich 

 it really io not.) 



* Scales moderate, 4:>-50 ill the course of the lateral line. 



309. P. teretulus Cope. 



Body slender, little compressed, the back not elevated, the caudal pe- 

 duncle stout. Head stout, the muzzle elongate, obtusely decurved, 

 heavy. Mouth small, inferior, horizontal, the maxillary not reaching to 

 eye. Isthmus wide. Breast scaly. Lateral line nearly straight. Eye 

 large, high up, 3.} in head. Pale yellowish ; the scales above dark- 

 edged ; snout blackish ; a plumbeous lateral band ; fins plain. Head 4§ ; 

 depth 4|. D. 8 ; A. 7 ; scales 6-43-5 ; teeth 4-4. L. 3 J inches. Kan- 

 awha River. 



(Cope, Proc. Acad. Nat. Sci. Phila. 1807, 9().) 



310. P. mirabilis (Grd.) .Jordan. 



Body moderately slender. Head short, rather blunt anteriorly. 

 Mouth small, the maxillary not reaching to the eye. Eye large, 4 in 

 head. Olivaceous; a silvery lateral band and a dusky spot at base of 

 caudal. Head 4; depth 4^. D. 8; A. 7; scales G-51-5 (teeth 1, 4-4, 1?). 

 L. 3 J inches. Arkansas River. {Girard.) 



(^Exofjlossum mirabile Grd. I'roc. Acad. Nat. Sci. Phila. IdfjG, 191, aud U. S. Pac. K. R. 

 Surv. X, 25G: Exoglostimn mirabile Giiathor, vii, 188; ? Sarcidium acopiferum* Cope, 



• Body moderately elongate, the back not elevated. Caudal peduncle stout. Head 

 rather short and thick, with i)roininent but obtuse muzzle. Mouth small, horizontal, 

 wholly inferior, the maxillary not reaching the eye. Top of head flat. Lateral line 

 nearly airaight. Eye large, 4^ in head. Yollovviah, with a silvery lateral band, which 

 t^rmiriatos in u black caudal spot; no dosal l)and ; tins plain. Head 4J ; depth 4|. 

 D. 8; A. 7; scales 6-44-5 ; teeth 4-4. L. 3 inches. {Cope.) Missouri River. 



