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. 36. Mass, 

 to 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- 

 tilus.) 



1. S. corpora/is, (Mitch.) Putnam. COMMON CHUB. 

 HORNED DACE. Body stout, depth 4-J 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 65; L. 10 to 12. New Eng- 

 land (Housatonic R., Jordari) to the Missouri region and 

 S.; the most widely diffused of our Cyprinidce, except- 

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

 circumstances by the large head and the peculiar dorsal 

 spot. (S. atromaculatus dorsalis, 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 4-J in length; head 4; D. 1, 8; 

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

 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.; Leucosomus cataractus, Baird.) 



20. PLATYGOBIO, Gill. FLAT -HEADED CHUBS. 

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



