>4 FISHES. 



depth, 4r^ in length; snout blunt; olive, a burnished, 

 t- black lateral band of a deeper color than in any 

 her small minnow; D. I, 8; A. I, 7; lat, 1, 36. Mass. 

 Md., abundant. 



18. SEMOTILUS, Rafinesque. Chubs. 

 Dorsal fin well behind ventrals, with a black spot at base ; scales 

 small, crowded forwards, 45 to 70 in the lateral line. (Semo- 

 tilm.) 



1. S. corporalis, (Mitch.) Putnam. Common Chub. 

 OBiTBD Dace. Body stout, depth 4J in length; head 

 pge, 3|-; dusky above, especially along edges of scales; 

 ies bluish, a black lateral band in young; silvery 

 ilow, sides and fins flushed with crimson in spring; 

 . I, 8; A. I, 8; lat. 1. 55 to 65; L. 10 to 12. New Eng- 

 ad (Housatonic R., Jordan) to the Missouri region and 

 ; the most widely diffused of our Cyprinidm, except- 

 g Wocomis biguttatus. It may be known under all 

 roumstances by the large head and the peculiar dorsal 

 lot. {8. atromaculatus dorsalis, cephalus, speciostcs, 

 c, etc., of authors.) 



■ Dorsal very slightly behind ventrals, without black spot at 

 base in front ; scales large, about 50 in lateral line, not much 

 crowded forwards. {Leucosomua, Heckel.) 



2. S. bullaris, (Raf.) Jor. Fall Fish. Dacb. Roach. 

 rownish above, with blue reflections; sides silvery, 

 sy in spring; depth 4^ in length; head 4; D. I, 8; 

 . I, 8; lat. 1. 46 to 50; largest of our Eastern CyprinidoB, 

 aching a length of 18 inches. New England to Vir- 

 nia, generally abundant in the rapids of the larger 

 reams. {Semotilics rhotheKS, argent&us and pulchellus, 

 uct.; Leucosomus cataractvs, Baird.) 



20. PLATYGOBIO, Gill. Flat -Headed Chubs. 



