FISHES OF NEW YORK 105 



developed, not much narrower than the fleshy part of the cheek 

 below them; opercular bones moderately developed, not rugose; 

 fontanel rather large; gill rakers rather long-; pharyngeal 

 bones weak; the teeth quite small, slender, and weak, rapidly 

 diminishing in length upward, each tooth narrowly compressed, 

 with a cusp on the inner margin of the cutting surface; scales 

 rather large, more or less crowded forward; no lateral line; 

 dorsal fin rather short and high, rays usually 11 or 12; pectoral 

 fins moderate; anal fin high and short, more or less emarginate 

 or bilobed in adult males; caudal fin moderately forked or lunate, 

 its lobes subequal. Air bladder with two chambers. (After 

 Jordan and Evermann) 



59 Erimyzon sucetta (Lacep^de) 

 Cliiib Sucker 



Cyprinus sucetta Lacepede, Hist. Nat. Poiss. V, 503, 006, 610, 1803.. 



Catostomtis sucetta Le Sueur. Jour. Ac. Nat. Sci. Phila. I, 109, 1817. 



Laheo gimosus De Kay, N. Y. Fauna, Fishes, 194, pi. 32, fig. 101, 1842 



(dorsal incorrect). 

 Catostomus tuherculatus De Kay, N. Y. Fauna, Fishes, 199, pi. 31, fig. 97, 



1842. 

 Laheo esopus De Kay, N. Y, Fauna, Fishes, 195, 1842. 

 Erimyzon goodei Joedan, Bull. 12, U. S. Nat. Mus. 148, 1878; Jordan & 



Gilbert, Bull. 16, U. S. Nat. Mus. 134, 1883; Goode, Fish, and Fish. 



Ind. U. S. pi. 221, 1884. 

 Erimyzon sucetta (part) Bean, Fishes Penna. 27, 1893. 

 Erknyzon sucetta Jordan & Evermann, Bull. 47, U. S. Nat. Mus. 185, 1896. 



The body of the chub sucker is oblong, rather deep and com- 

 pressed. Its depth one third of standard length. The head is 

 rather short, broad above, its length one fourth of total length 

 to caudal. The mouth is rather small and but slightly inferior, 

 protractile. The eye is contained five times in length of head 

 and slightly less than twice in its distance from tip of snout. 

 Dorsal short, rather high, placed in middle of length; ventrals 

 directly underneath; highest dorsal ray (fourth) not quite equal 

 to second anal ray, about two thirds of length of head; caudal 

 slightly forked. No lateral line. D. 12 to 15; A. 7 to 8; V. I, 7. 

 Scales 37 to 40; transverse 13 to 15. 



The chub sucker here described is the southern form which 

 was first made known by Lacepede from an individual received 



