Jordan and Evermann. — Fishes of North America. 303 



extremely wide. Intestines short; peritoneum white. Small species, 

 with the aspect of young suckers, ((ptva^, deceptive; flioc, life; the 

 appearance of the fish suggesting an herbivorous species with long 

 intestines, which it really is not.) 



a. Scales moderate, 42 to 53 iu the lateral line. 



6. Breast scaly ; no distinct Bpot at base of caudal. teretulus, 500. 



66. Breast naked ; caudal spot very distiuct. 



c. Scales in lateral lino 49 to 53, their outlines blended. mihabilis, 501. 



cc. Scales iu lateral line 43 to 45, their outlines emphasized by dark edgings. 



SCOPIFEH, 502. 



aa. Scales small, about 60 in the course of the lateral line ; breast naked. 



(i. Body very slender ; base of caudal with a distinct black spot. uuanops, 503. 



M. Body moderately slender ; base of caudal with a vague dusky blotch. 



CATOSTOMUS, 504. 



500. PHENACOBIUS TERKTULUS, Cope. 



Head 4f ; depth 4| ; eye large, high up, 3i in head. D.8; A. 7; scales 

 6-43-5; teeth 4-4. Body slender, little compressed, the back not elevated, 

 the caudal peduncle 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. Pale yellowish ; the scales above dark-edged; snout blackish; a 

 plumbeous lateral band ; fins plain. Length Scinches. Kanawha River ; 

 not common. (Teretulus, an old name of the Red Horse, Moxostoma.) 



Phenacohms lerehilus. Cope, Proc. Ac. Nat. Sci. Phila., 1867, 96, Kanawha River, Eggleston 

 Springs, West Virginia. (Coll. Cope.) Jordan & Gilbert, Synopsis, 204, 1883. 



501. PHENACOBIUS MIRABILIS (Girard). 



Head ^\; depth 4^; eye large, 4 in head. D. 8 ; A. 7 ; scales 7-48 to 52-5. 

 Body moderately slender. Head short, rather blunt anteriorly. Mouth 

 small, the maxillary not reaching to eye. Pale olivaceous ; a silvery lat- 

 eral band and a conspicuous black spot at base of caudal, smaller than 

 eye; outlines of scales blended, not emphasized by dark edgings. Fins 

 pale. Length 3^ inches. Illinois River to Arkansas, rather common in 

 sandy streams ; specimens examined from the Illinois, Des Moines, Osage, 

 Missouri, Arkansas, and Sabine rivers. (miraMlis, wonderful.) 



Exoglossum mirabile, Girarp, Proc. Ac. Nat. Sci. Phila., 1856, 191, and Pac. R. R. Surv., .\,25G, 1858, 



Arkansas River, Fort Smith. (Coll. Shumard.) 

 Phetiacobins mirahilifi, Jordan & Gilbert, Synopsis, 205, 1883 ; Jordan & Meek, Proc. U. S. Nat. 



Mus., 1885, 6. 



502. PHENACOBIUS SCOPIFEB (Cope). 



Head 4 to 4i ; depth 4i ; scales 6-43 to 45-5. Very close to the preced- 

 ing, differing so far as known only in the larger scales, the outlines of 

 which are sharply defined on account of dark edgings. Caudal spot dis- 

 tinct. Illinois to the Rio Grande, about as abundant as the preceding, 

 perhaps more widely distributed. It is possible that this form represents 

 simply the extreme of variation of P. mirabilis. (scojiifer, bearing a stem. ) 



Sarcidiiim scopifenm, Cope, Hayden's Oeol. Surv. Wyom. for 1870, (1871), 440, Missouri River, 



near St. Joseph, Missouri. 

 Phenarobius teretulus li^slenius, Nelson, Bull. III. Lab. Nat. Hist, i, 1876, 46, brooks of McLean 



County, Illinois. 

 Phenacobius scopifents, Jordan, Bull. Hayden's Geol. Surv., iv, 666, 1878. 

 Phetiacobins mirabilis, in part, Jordan & Gilbert, Synopsis, 205, 1883. 



