2. C. MGRTCANS. 



The Black, or Mud Siickci. 



Similar in shape to the precoJiiig. Head largo and sijuait'. 

 Black above; reddish yellow on the sides, with black blotch.es: 

 beneath white. Dorsal iin black, the otlier tins reddish. 



li^iu-rays:— 1). 11; V. 18; A'. 0; A. 8; C. \S. 



0. nu/ricons, Lesuenr, Juiirn. Ac. Nat. >Sc., 1. 1817, l>. K'2: 

 Kirtland, Boston Jonrn. Nat. Hist., V. p. 2To, pi. 21, fig. o. 



Found in the Youghioghany River, in the njonntains of 

 Maryland. 



S. I. 



H. C. DT'QT^ESXir. 



The Red Horse, or Pittsbui;u' Sucker. 



The height of the body is nearly cc^nal to the lenglh of the 

 hcad^ which is one-fourth of the total (without caudal). IMie 

 strong scales are of nearly the same size over the entire bndy. 

 Back and forehead dusky-olive and co[)pery; sides cu[)pery; 

 abdomen white. 



Fin-rays;--]). 14; T. 17; V. lU; A. [); C. 18. 



C. dirqucmii,, Lesueur, Journ. Ac. Nat. Sc.^ riiilad., 1. ]>. 

 105; Kirtland, Boston Journ. Nat. Hist., V. p. 2G8, pi. 20, 

 fig. l,p]. 21,lig. 2. 



— enjtJirunis, Rafines(|ue. 



PlijcliOfitomriJi dnquesnii, Agassiz, Am. Journ. Sc. cv Arts, 

 XIX. 1854, p. 90. 



Found in the Youghioghany River. 



4. C. MACULOSUS. 



The Jack Mullet, or Black Sucker. 



Head large, square, declivous. Eyes small. Lateral lino 

 utraiglit. Reddish, with irregular black blotches. Pectorals 



