ies 
RED-MOUTH BUFFALO FISH. 805 
line well developed, but not as distinct as in Carpiodes, slightly decurved anteriorly, the 
number of scales in its course 36 to 42; 13 to 15 in a transverse series from dorsal to ven- 
trals; dorsal fin with an elongate basis, its number of rays 25 to 30, the anterior rays 
somewhat elevated, their length about half that of the base of the fin ; caudal not much 
forked ; anal fin not much elevated, its rays about 9 in number; pectorals and ventrals 
moderate, the latter with about 10 rays ; sexual peculiarities, if any, unknown; colora- 
tion dark, not silvery, above dusky olive; lower fins more or less black; air bladder 
with two chambers ; size very large. But one species is certainly known. 
27. IcHTHYOBUS BUBALUS (Rafinesque) Agassiz. 
BRed-mouth Buffalo Fish; Large-mouthed Buffz2lo. 
Ambludon bubalus, RAFINESQUE, Journal de Physique, 1818, 421. 
Catostomus bubalus, RAFINESQUE, Am. Month. Mag. and Crit. Rev., 1818, 354; Ich. Oh, 
1820, 55, 
Ichthyobus bubalus, AGAssiz, Am. Journ. Sci. Arts, 2d series, xix, 1855, 196.—JORDAN, 
Fishes of Icd., 1875, 222; Bull. Buffalo Soc. Nat. Hist., 1876, 95; Man. Vert., 1876, 
298; Proc. Acad. Nat. Sci. Phila., 1877, 72; Bull. U. S. Nat. Mus., ix, 1877, 34; Man. 
Vert., 2d Ed., 1878, 3223; Ball U.S. Nat. Mus., xii, 1878, 214.—JORDAN and COPE- 
LAND, Check List, 1876, 153.— JORDAN and GILBERT, in Klippart’s Rept., 1876, 53.— 
NELSON, Bull. No. 1, Ills. Mus. Nat. Hist., 1876, 49. 
Sclerognathus cyprinella, CUVYIER and VALENCIENNES, Hist. Nat. des Poissons, xvii, 1844, 
477, pl. 518.—STORER, Synopsis, 1846, 428.—GUNTHER, Cat. Fishes Brit. Mus., vii, 
1868, 24. ; 
Icththyobus cyprinella AGassiz, Am. Journ. Sci. Arts, 1855, 196 —JORDAN, Man. Vert., 
1876, 298.— JoRDAN and COPELAND, Check List, 1876, 158. 
Ichthyobus rauchiit, AGassiz, Am. Journ. Sc. Arts, 2d series, xix, 1855, 196.—PUTNAM, 
Bull. Mus. Comp. Zool., 1563, 10 —JoRDAN and COPELAND, Check List, 1876, 158.— 
JORDAN and GILBERT, in Klippart’s Rept., 1876, 53.—JoRDAN, Man. Vert., 2d. Ed., 
1878, 323. : 
Icthyobus stolleyi, AGassiz, Am. Journ. Sci Arts, 2d series, xix, 1855, 196.—JORDAN and 
COPELAND, Check List, 1876, 158. 
Icthyobus ischyrus, NELSON, MSS.—JoRDAN, Proce. Acad. Nat. Sci. Phila., 1677, 72.— 
JORDAN and CopeLanD, Check List, 1876, 158.—JoRDAN and GILBERT, in Klippart’s 
Rept., 1876, 53.—JORDAN, Man. Vert., 2d Ed., 1878. 
Description.— Body robust, moderately compressed, the outline somewhat elliptical, 
but the back rather more curved than the belly; depth 24 to 34 in length; head very 
large and thick, 34 in length of body; opercular apparatus very strong, the operculum 
itself forming nearly half the length of the head ; scales very large; developed rays of 
the dorsal 26 to 29; anal rays 9; ventral 10; scales 7-37 to 41-6; coloration dull brown- 
ish-olive, not silvery ; fins dusky; size very large, reaches a length of nearly three feet 
and a weight of 20 to 30 pounds. 
Habitat, Mississippi Valley, generally abundant in the larger streams. 
Diagnosis —This species is at once distinguished from the other Buffalo 
_ Fishes by the large terminal mouth and very thin smooth lips. 
Habits—This species abounds in the Ohio River and its larger tribu- 
