304 FISHES. 



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

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

 other small minnow; D. I, 8; A. I, 7; lat. 1. 3G. Mass. 

 to Md., abundant. 



18. SEMOTILUS, Rafinesque. Chubs. 



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

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

 tilus.) 



1. S. corpora/is, (Mitch.) Putnam. Commote Chub. 

 Horned Dace. Body stout, depth 4|- in length; head 

 large, 3f ; dusky above, especially along edges of scales; 

 sides bluish, a black lateral band in young; silvery 

 below, sides and fins flushed with crimson in spring; 

 D. I, 8; A. I, 8; lat. 1. 55 to G5; L. 10 to 12. New Eng- 

 land (Housa tonic R., Jordaii) to the Missouri region and 

 S.; the most widely diffused of our Cyprinidm^ except- 

 ing N^ocomis biguttatus. It may be known under all 

 circumstances by the large head and the peculiar dorsal 

 spot. {^S. atromaculatus dorsalls^ cephalus^ speciosus^ 

 etc., 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. {Leucosomus, Heckel.) 



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

 Brownish above, with blue reflections; sides silvery, 

 rosy in spring; depth ^^ in length; head 4; D. 1, 8; 

 A. I, 8; lat. 1. 46 to 50; largest of our Eastern Cyprinidm^ 

 reaching a length* of 18 inches. New England to Vir- 

 ginia, generally abundant in the rapids of the larger 

 streams. {Semotilus rhotheus^ argenteus and pulchellus^ 

 Auct.; Ijeucosomus cataractus^ Baird.) 



20. PLATYGOBIO, Gill. Flat -Headed Chubs. 

 1. P. gracilis, (Rich.) Gill & Jordan. Body long and 



