298 FISHES. 



muzzle; D. I, 8; A. I, 10; lat. 1. 40. Streams of the 

 Allegheny region from Penn. S. (Photogenis leucops, 

 Cope.) 



7. M. telescopus, Cope. Similar, but more slender 

 (usually), and the mouth more oblique; dorsal still less 

 posterior, midway between snout and origin of caudal; 

 sea green; dorsal scales dark-edged; sides silvery; eye 

 larger, 2f in head; D. I, 8; A. I, 10; lat. 1. 38. Tennes- 

 see River; perhaps a variety of the preceding. 



8. U. lirus, Jordan. STEEL - SIDED MINNOW. 

 Smaller than any of the preceding, and very slender ; 

 the depth 4f in length; the head small, 4J; scales very 

 small, and very thin, so that young specimens appear 

 naked; the scales in front of dorsal, 25 in number, 

 especially small; fins small; dorsal far back; head in 

 spring males strongly tuberculate, and the fins red; 

 color, very pale transparent green; sides with a very 

 distinct metallic steel-blue band; D. I, 8; A. I, 10; lat. 

 1. 45; L. 2. Tennessee and Alabama Rivers; a strongly 

 marked species, related to the genus Lythrurus^ but the 

 teeth are sharp- edged. 



10. EPISEMA, Cope & Jor. WHITE-CHEEKED SHINEKS. 

 (Photogenis^ Cope in part; Episema, Cope & Jordan.) 



1. E. ariomma, (Cope) Jor. BIG -EYED SHINEB. 

 General appearance of JV. rubellus, but larger, reaching 

 a length of nearly 5 inches; eye very large, 2 in head, 

 relatively larger than in any other of our Minnows; head 

 large; bluish above, sides bright silvery; D. I, 8; A. I, 9; 

 lat. 1. 40. White R., Indiana, abundant, but not yet 

 recdgnized elsewhere. 



2. E. scabriceps, (Cope) Jor. ROUGH-HEADED SHINER. 

 Head broad, prickly in spring; eye large, 3 in head; 



