Jordan and Evermatm. Fishes of North America. 193 



ing to moderately elongate. Lips rather full, the bluntish muzzle pro- 

 jecting beyond the large month ; greatest depth of cheeks more than \ 

 distance from snout to preopercle. Eye rather large. Dorsal fin medium, 

 its developed rays 12 to 14, usually 13 in number, its free edge nearly 

 straight, its longest ray shorter than head. Scales large, about 45 in the 

 lateral line. Olivaceous; sides silvery; lower fins in the adult red or 

 orange. Lake Ontario and Lake Michigan to the Missouri River, south 

 to Arkansas and Georgia; everywhere abundant west of the Allegheny 

 mountains. This perhaps may vary into M. macrolepidotum, of which it 

 has been considered a variety, but for the present at least we think it 

 best to regard it as distinct, (aureolus, gilded.) 



Catostomus aureolus* LE SUEUR, Jour. Ac. Nat. Sci. Phila., I, 95. 1817, Lake Erie, near Buffalo. 

 Catostomus erythrurus, RAFINESQUE, Am. Month. Mag., 1818,354, Ohio River. 

 Catostomus duquesni, GUNTHER, Cat.,vn, 18, 1868. 



Catostomus oneidaj DE KAY, N. Y. Fauna: Fishes, 198, 1842, Oneida Lake. 

 Rutilus melanurus, KAFINESQUE, Ich. Oh'., 51, 1820, Ohio River. 



Ptychostonms duquesnei,l erylhrurus, oneida, etc., COPE, Proc. Am. Phil. Soc. Phila, 1870. 

 Myxostoma euryops, JORDAN, Ann. Lye. Nat. Hist. N. Y., 1876, 348, Oostanaula River, Rome, 

 Georgia, is probably a monstrosity of this species. 



315. MOXOSTOMA ROBUSTUM, (Cope). 



Body stout, the back elevated. Head short and deep ; the snout not 

 prominent, truncate in profile. Eye 4 to 5 in head. Dorsal short, its 

 upper margin straight. D. 12. Head 4 to 4-J in length. Color smoky or 

 clouded above, with golden reflections, yellowish below; dorsal, anal, and 

 caudal dark crimson. Size large, weight 6 pounds or more. Yadkin River, 

 North Carolina. (Cope). A doubtful species, apparently resembling M. 

 aureolum, and perhaps identical with it. (robustus. robust.) 



Piychostomm rol^stm, COPE, Proc. Am. Phil. Soc. Phila., 1870, 473, Yadkin River, North Caro- 

 lina. 



316. MOXOSTOMA MACROLEPIDOTUM, (Le Sueur). 



Head moderate, rather stout, its length 4f in body, eye If in snout ; 

 dorsal fin with its free edge concave. Scales usually with dusky shade at 

 base; lower fins pale. Streams about Chesapeake and Delaware bays, 



* C. aureolus. "Anal fin long, pointed and passing considerably beyond the base of the caudal 

 fin, which is forked, with pointed lobes, the inferior of which is the largest ; abdominal fin 

 truncated. Body subcylindric, elevated at the nape; head quadrangular, gibbous above the 

 eye, almost as high as long; the rays of the anal fin are very strong and large; scales 

 rhomboidal, equal ; body of a beautiful orange color, which is deepest on the back, the based of 

 the scales dark red; the sides are heightened with golden reflections; pectoral, ventral and 

 anal fins of a fine red orange, caudal fin of a deep carmine color the dorsal fin is paler than 

 the rest; the lateral lino is nearly straight, and commences in a line with the eye. Length of 

 individual described 16 inches, its depth 3 inches and its thickness 2% inches. P. 18. D. 14. 

 V. 9. A. 8. C. 18. This beautiful species I discovered near Buffalo on Lake Erie." Le Sueur. 



There is no reason for supposing this to be anything other than the common Red Horse. 

 The name Moxostoma aureolum has been applied by us to short-headed specimens of Red Horse, 

 but we have never felt sure that these were specifically distinct from the ordinary sort. Some 

 specimens thus named probably belong to Moxostoma brcviceps. 



f Moxostoma oneida (De Kay), a species with the back much arched, the head small, nearly 6 

 in total length with caudalj'eye small, 6 in head; mouth inferior. Bluish above, paler below. 

 D. 13. Oneida Lake (De Kay). This is probably identical with M. aureolum. 



I C. duquesnei, Le Sueur has been usually identified with this species. It seems, however, 

 more likely to have been what has usually been called Placopharynx carinatut. 



F. N. A. 14 



