224 FISHES. 



thick, not contracted; cheeks naked; snout blackish; D. 

 IX— 13; A. II, 8; lat. 1. 40; caudal rounded. .Maryland 

 to N. C. 



2. B. vexillare, Jor. High - Finned Darter. Sim- 

 ilar to the preceding, but with the second dorsal very 

 short and high and scales very large; head black; D. IX 

 — 10; A. I, 8; lat. 1. 34. Rappahannock R., Va, 



** Lat. 1. more than 40. 



3. B. olmstedi, (Storer) Ag. Tessellated Darter. 

 Fins stouter and higher than in the next; depth 5:^ in 

 length; head 4^; olivaceous, fins barred; back tessel- 

 lated; a black streak forward, and another downward 

 from eye; cheeks and opercles scaly; neck and throat 

 bare; D. rX-14; A. I, 8; lat. 1. 50. New England to 

 Wisconsin; abundant eastward. {B. tessellatum^ DeK.) 



4. B. atromaculaia, (Grd.) Jor. Neck and throat scaly; 

 fins very high; spinous dorsal with a large black spot at 

 base. Eastern streams. 



5. B. nigrum, (Raf.) Jor. Johnny Darter. Paler and 

 more distinctly tessellated; brownish yellow; upper 

 surface dotted with brown, the spots forming a few dark 

 bars on back; a dark line from eye to snout; and some- 

 times a bar below eye; smaller and slenderer than the 

 preceding, with smaller fins; eye as long as the narrow, 

 pointed snout; cheeks, neck and throat naked; opercles 

 scaly; D. IX-12; A. 1, 8 to I, 10; lat. 1. 45. E. U. S., 

 abundant, west of the Alleganies. {B. hrevipinne^ Cope.) 



G. B. CBSOpus, Cope. Caudal peduncle contracted; 

 dorsal outline curved; fins high; brownish, with spots on 

 back and sides; D. VII-14; A. 10; lat. 1. 47. Allegheny 

 River, Penn. 



