320 FISHES. 



1. C.commerson/'/,(La,c.)JoT. COMMON -SUCKER. WHITE 

 SUCKER. Depth about equal to length of head, 4 to 4 

 in length; olivaceous, sides silvery, with bright reflec- 

 tions; males with the sides roseate in spring; D. I, 12; 

 lat. 1. 63. U. S., abundant every where east of the 

 Rocky Mountains. (C. communis, bostoniensis, teres, 

 sucklii, etc., of authors.) 



** Lateral line with about 100 scales; snout much produced. 

 (Gatostomus.) 



2. C. Ion g /rostrum, LeS. RED-SIDED SUCKER. LONG- 

 NOSED SUCKER. Slender, depth less than length of 

 head; sides with a bright red band, and upper part of 

 head with small tubercles in males in Spring; D. T, 10; 

 lat. 1. 110. Great Lakes, Upper Mississippi and North- 

 ward, abundant. [(7. hudsonius, LeS., C. aurora, Ag.; 

 C. griseus and (7. lactarius, Grd. ; C. forsterianus, (Rich.) 

 not C. forsteriamis, Ag., which is probably C. commer- 

 soniiJ] 



8. CYCLEPTUS, Rafinesque. SUCKERELS. 



= Rhytidostomus, Heckel. 



1. C. elongatus, (LeSueur) Ag. BLACK HORSE. 

 GOURD- SEED SUCKER. MISSOURI SUCKER. Body fusiform, 

 not greatly compressed; head and mouth very small; 

 depth four to five in length; head 6^; eye small, well back, 

 6 to 7 in head; lobes of dorsal and caudal much atten- 

 uated; longest dorsal rays a little longer than head; 

 pectorals falcate, as long as head; anal fin small; scales 

 with the exposed surfaces broad; $ jet black above, sides 

 black with a coppery luster; snout minutely tuberculate 

 in spring; $ olivaceous; D. 30; A. 7; lat. 1. 56; length 2 to 

 3 feet; weight 2 to 15 Sbs. Mississippi Valley, in large 

 streams. A singular species, quite unlike any other. 



