FISHES 79 



N. stilhius Jord. Length 75 mm.; head 4.2; depth 5; color pale 

 green; sides with a broad silvery band and numerous dark dots which 

 form a blotch at the base of the tail fin ; rays of anal fin 10; scales 5-37-2 ; 

 teeth 2, 4-4, i; eyes very large: Tennessee and Alabama; common. 



N. atherinoides Raf. Length 150 mm.; head 4.6; depth 5.5; color 

 translucent green; sides silvery; rays of anal fin 11 ; scales 5-38-3; body 

 long and slender; mouth very oblique; eyes very large: Great Lakes 

 region and Ohio and Mississippi Valleys; northward to Winnipeg; 

 common in lakes and river channels. 



N. dilectus (Gir.). Length 85 mm.; head 4.6; depth 4.5; color very 

 pale; snout and base of fins rosy; rays of anal fin 11; scales 7-38-3; 

 body elongate; mouth obUque: basin of the Ohio to the Rio Grande; 

 common. 



N. rubrifrofis (Cope). Length 70 mm. ; head 4; depth 5 ; color oliva- 

 ceous; sides silvery; rays of anal fin 10; scales 5-39-3 ; mouth very obHque: 

 New York and western Pennsylvania to southern Michigan ; southward 

 to Mississippi and Kansas; very common in clear streams, especially in 

 the Ohio Valley. 



V. photogenis (Cope). Length 75 mm.; head 4.25; depth 5.5; color 

 olivaceous; sides and belly silvery, with dark specks along the lateral 

 line rays; rays of anal fin 10; scales 6-40-3, 25 before the dorsal fin: 

 western Pennsylvania to Michigan and southward; common in clear 

 streams. 



N. scepticus (J. & G.). Length 75 mm.; head 3.75; depth 4.5; color 

 pale green; sides with a silvery band; rays of anal fin 10; scales 6-38-3, 

 14 before the dorsal fin; eyes very large: the Cape Fear to the Santee 

 Rivers; common. 



N. micropteryx (Cope). Length 70 mm.; head 4.5; depth 5.5; color 

 olivaceous; sides silvery, with a dusky blotch at the base of the tail fin; 

 rays of anal fin 10; scales 6-39-2; body very slender, compressed; mouth 

 large, oblique: head waters of the Cumberland and Tennessee Rivers; 

 also in the Ozark region; common. 



N. metallicus J. & M. Length 45 mm.; head 4; depth 5; color dark 

 brown, with a rosy band from the eye to the upper lobe of the tail, below 

 which is a metallic dusky band ending in a broad black spot at the 

 base of the tail fin; rays of anal fin 1 1 ; scales 5-35-3 : swamps and streams 

 in southern Georgia and northern Florida. 



39. Lythrurus Jordan. Similar to Notropis; body elongate, com- 

 pressed; scales closely impricated; dorsal fin with a black spot and 

 behind the ventrals; anal fin with 10 to 12 rays: 4 species. 



