5. Dorsal tin beginning over base of ventral tins; scales large, 45 in 

 lateral line; silvery 



Falltish 



Seinotiliis 

 corporalis 



(Mitchill) 



Dorsal fin beginning just behind base of ventral fins; scales smaller, 

 about 50 in lateral line 6 



6. Black spot on dorsal fin near front of base, indistinct in young; 



mouth large, upper jaw extending at least to below front of eye; 

 sides not mottled by specialized dark scales; scales in lateral line 

 fewer than 60 



Creek Chub 

 Semotihis atromaculatus (Mitchill) 



No black spot on dorsal fin; mouth small, upper jaw not extending 

 to below front of eye; sides mottled by specialized dark scales; 

 scales in lateral line about 65 to 75 



Pearl Dace 

 Semotihis }nayi>arita (Cope) 



7. Lateral line scales more than 60 8 



Lateral line scales less than 55 10 



8. Lateral line incomplete; more than 80 scales in lateral line 



Finescale Dace 

 Chrosomus neogaeiis (Cope) 

 Lateral line complete; scales fewer than 80 in lateral line ... 9 



9. Body with a single dusky lateral band; intestine short, with a single 



main loop, and less than twice as long as the body 



Pearl Dace 

 Semotilu.s nuiri^arita (Cope) 

 Body with two black lateral bands; intestine elongate, with two 

 crosswise coils in addition to the primary loops, and more than 

 twice as long as the body 



Northern Redbelly Dace 

 Chrosomus eos (Cope) 



63 



