CHUB SDCKEK. 821 



and mnch longer than broad; opercular bonesmoderatel.N developed, soarcelyornotrugosf ; 

 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 diminibhing in length upwards, 

 each tooth narrowly compressed, with a cusp on the inner margin of the cutting sur- 

 face, and some ineq\ialitie8 besides ; Body oblong, rather shortened, heavy forwards and 

 coi-'ideriibly compressed; scales ralher large, more or less crowded forwards, some- 

 tiii-eo showing irregularities of arrangement, the longitudinal radiating farrows 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 entrely wanting ; scales 

 in the longitudinal series from head to base of caudal 'S5 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 ra^s, 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 teu ; anal fin high and short, more or 

 less emarginate or bilobed in adult 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 oconrriog in 

 all the streams of the United States east of the Rocky Mountains. 



41. Ekimyzon sucetta (Lacipede) Jordon. 



Chub Sucker; Creek Fish; Mullet; Sweet Sucker. 



Cyprinus sucetta, Lacppkde, Hist, Nat. des Poissons, v, 1803, 606, 610. 



Catoslomus sucetta, LkSujsur, Journ. Acad. Phila., 1817, 109. — DbKay, New York Fauna, 

 part iv. Fishes, 1842, 203. 



Catostomus euceii, Covihr aud Valenciennes, Hist. Nat des Poissons, xvii, 1844, 466. — 

 Stoker, Synopsis, 1846, 419. 



Moxostoma sucetta, Agassiz, Am. Jour. Soi. Arts, 2d series, xix, lo55, 202, — Putnam, Bull. 

 Mus Comp Zool, 1869, 10. 



JSnmyzoftSMceWa, 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. Mitcuii-L, Lit. and Phil. Traiis New York, 1, 1814, 459. 



Catostiimus oblongus, LbSueur, Journ. Acad. Nat. Soi , 1817, 108. — Thompson, Hist. Vt., 

 1842. 134 (S.vnonymy, but not description, which applies to M. macrolepidotum.) — 

 CuviKR and Valbk cienn* s, Hist. Nat. des Poissons, xvii, 1844, 411. — Stoker, Syn- 

 opsis, 1846, 423. 



Laheo oblongus DkKay, New York Fauna, part iv, Finhes, 1^42, 193, 



Moxostoma oblongum, Agasstz, Am. Journ Soi Arts, 2d series, xix, 1855, 203 — Pdtnam, 

 Bull. Mus. C(imp. Zoo]., 186!, 10. — Gill, Canadian Nat., p. 19, Ausf., 1865. — Gunther, 

 Cat. Fishes Brit. Mus., vii, 1868, 21.— Cope, Proc. Am PhiLis. Soc. Phila., 1870, 468. 

 — JoKDAN, Fishes of Ind., 1875, 211 (name only). — Uhlbr and Lugger, Fishes of 

 Maryland, 1876, 140. 



Erimyznn oblongus, Jordan Bull. Buffalo Poc. Nat. Hist., 1876, 25 (name only; gen- 

 eric diagnosis of £rim.(/roM) ; Mao. Veit., 1"!76, 294; Ann. Lyo. Nat. Hist., xi, li-77, 

 346; xi, 1877, 365; Bull. U. S. Nat. Mus., ix, 1877, 36.— Nelson, Bull, No. 1, Ills. 

 Mus. Nat. Hist., 1876, 48.— Joudan and Copeland, Check List, 1876, 157 (name 

 only). 



