278 FISHES. 



peculiar dorsal spot. (/S. atromaculatm, dorsalis, 

 cephalus, speciosus, etc., etc., of authors.) 



Var. pallidus, (Grd.) Jordan. PALE CHUB. Differs 

 in its pale color and slightly smaller scales. Missouri 

 region and S. 



** Scales larger, scarcely crowded anteriorly; lat. 1. 45 to 55; no 

 dorsal spot. (Leucosomus, Hseckel.) 



2. S. argenteus, (Storer) Putn. EASTERN CHUB. 

 ROACH. Brownish, sides roseate; depth 4J in length; 

 head 4; eye 5 in head; D. I, 8; A. I, 8; lat. 1. 51; L. 12 

 to 14. New England and New York. [S. pulchdlus, 

 (Storer) Gill.] 



3. S. rhotheus, Cope. BIG CHUB. ROSY FALL FISH. 

 Steel, blue above, sides silvery, rosy in spring; propor 

 tions of the last; D. I, 8; A. I, 8; lat. 1. 46; the largest 

 of our Cyprinidce, reaching a length of 18 inches. 

 Mass, to Md., in the larger streams. 



8. CERATICHTHYS, Baird. HORNED CHUBS. 



&amp;gt; Nocomis, Grd. 



&amp;lt; Gobio, Cuvier (European). 



* Mouth nearly terminal ; rather large species, scarcely silvery, 

 resembling Semotilus. (Ceratichthys.) 



f Lateral line with 40 to 45 scales. 



1. C. melanotus, (Raf. ) Jordan. HORNED CHUB. 

 JERKER. Bluish olive, sides with bright green and 

 coppery reflections; a curved blotch behind the opercle; 

 fins pale orange, unspotted; white below, rosy in spring; 

 adult males in the spring with the top of the head 

 very much swollen, elevated into a sort of crest, some 

 times nearly one-third of an inch higher than the level 

 of the neck, covered with large tubercles; a stout 

 species, with large scales which are not crowded 



