CHUB SUCKER. 821 
and much longer than broad; opercular bones moderately developed, scarcely or notrugose; 
fontanelle evident, rather large; gill. rakers rather long, about half the diameter of the eye 
in length; isthmus moderately developed, about the width of the eye; pharyngeal bones 
weak, teeth quite small, slender, and weak, rapidly diminishing in length upwards, 
each tooth narrowly compressed, with a cusp on the inner margin of the cutting sur- 
face, and some inequalities besides; Body oblong, rather shortened, heavy forwards and 
considerably compressed; scales rather large, more or less crowded forwards, some- 
ties showing irregularities of arrangement, the longitudinal radiating furrows much 
stronger than usual, the scales rather longer than deep, but so imbricated in the adult 
that the exposed surfaces appear deeper than long; lateral line entirely wanting ; scales 
in the longitudinal series from head to base of caudal 35 to 45 in number; scales in’ 
transverse row from base of ventral to dorsal 12 to 18; dorsal fin rather short and high, 
with from 10 to 14 developed rays, the number usually 11 or 12; beginning of dorsal fin 
rather nearer snout than base of caudal; pectoral fins moderate, not reaching ventrals ; 
the latter not to vent; ventrals under a point rather in advance of the middle of dorsal ; 
their rays normally nine, but occasionally eight to ten; anal fin high and short, more er 
less emarginate or bilobed in aduit males; caudal fin moderately forked or merely lun- 
ate, its two lobes about equal; air-bladder with two chambers. 
This genus has a very wide range, one of its two known species probably occurring in 
all the streams of the United States east of the Rocky Mountains. 
41. Erimyzon sucetta (Lacipede) Jordon. 
Chub Sucker; Creek Fish; Mullet; Sweet Sucker. 
Cyprinus sucetta, LACEPEDE, Hist, Nat. des Poissons, v, 1803, 606, 610. 
Catostomus sucetta, LESUEUR, Journ. Acad. Phila., 1817, 109.—DrKay, New York Fauna, 
part iv, Fishes, 1842, 203. 
Catostomus suceti, CUVIER and VALENCIENNES, Hist. Nat. des Poissons, xvii, 1844, 466.— 
STORER, Synopsis, 1846, 419. 
Moxostoma suceita, AGassizZ, Am. Jour. Sci. Arts, 2d series, xix, 1355, 202.—PuTNaM, Bull. 
Mus. Comp. Zool., 1869, 10. 
Erimyzon sucetta, JORDAN, Man. Vert., 1876, 291; 2d Ed., 319; Bull. U.S. Nat. Mus., xii, 
1878, 144 —JORDAN and COPELAND, Check List, 1876, 157. 
Cyprinus oblongus, MircHILL, Lit. and Phil. Trans. New York, 1, 1814, 459. 
Catostomus oblongus, LESuUEUR, Journ. Acad. Nat. Sci., 1817, 108.—Tuompson, Hist. Vt., 
1842, 134. (Synonymy, but not description, which applies to M. macrolepidotum.)— 
CUVIER and VALENCIENNES, Hist. Nat. des Poissons, xvii, 1844, 411.—StTorER, Syn- 
opsis, 1846, 423. 
Labeo oblongus, DeKay, New York Fauna, part iv, Fishes, 1242, 193. 
Moxostoma oblongum, AGAssiz, Am. Journ. Sci Arts, 2d series, xix, 1855, 203.—PuUTNAM, 
Bull. Mus. Comp. Zool., 1863, 10.——GILL, Canadian Nat., p. 19, Aug., 1865.—GUNTHER, 
Cat. Fishes Brit. Mus., vii, 1668, 21.—Corsr, Proc. Am. Philos. Soc. Phila., 1870, 468. 
—JORDAN, Fishes of Ind., 1875, 211 (name only).—UHLER and LUGGER, Fishes of 
Maryland, 1876, 140. 
Erimyzon oblongus, JORDAN, Bull. Buffalo Soc. Nat. Hist., 1876, 25 (name only; gen- 
eric diagnosis of Hrimyzon) ; Man. Vert., 1376, 294; Ann. Lyc. Nat. Hist., xi, 1577, 
346 5; xi, 1677, 365; Bull. U.S. Nat. Mus., ix, 1877, 36.—NELSON, Bull, No. 1, Ills. 
Mus. Nat. Hist., 1676, 48.—JORDAN and COPELAND, Check List, 1876, 157 (name 
only). 
