With a purplish band along each side; base of dorsal fin red in males; 

 length about five times depth; Tennessee Valley 

 Islotropis leuciodus (Cope) 



264. Usually with ten rays in the anal fin; dorsal fin starting above posterior 



end of base of pelvic fins 265. 



Usually with seven to nine rays in the anal fin; dorsal fin starting above 



pelvic fins 266. 



265. Lateral band obscure; eye about as long as snout; length about five and 



onC'half times depth; Great Lakes, south and west 



J\lotropis athermoides Raf. Emerald Shiner 

 Lateral band dark posteriorly; snout longer than eye; length somewhat 

 less than five times depth; N. Y. to Kansas 



T^otropis ruhrifrons (Cope) Rosy'faced Minnow 



l^otropis ruhellus (Agassiz) 



266. Lower jaw projecting; no distinct dark lateral bands 267. 

 Jaws about equal 268. 



267. Outer half of dorsal fin dark; length slightly less than four and onchalf 



times depth; Cumberland region 

 Coccotis coccogenis (Cope) 

 (Jslotropis coccogenis (Cope) ) 

 Fins plain; length slightly more than four and one-half times depth; 

 Virginia 



Coccotis macdonaldi (J. fe? J.) 

 (T^otropis macdonaldi J. & J.) 



268. Usually with seven rays in the anal fin; with a silvery stripe along each 



side; Penna. to Kansas 



Paranotropis jejunus (Forbes) 

 (]\[otropis jejunus (Forbes) ) 

 Usually with nine rays in the anal fin 269. 



269. No red color; with about fifteen scales before the dorsal fin; length four 



and one-half to five times depth; Ohio and Tennessee Valleys 

 Paranotropis ariommus (Cope) 

 (l\lotropis ariommus (Cope) ) 

 Males with much red coloring; with fifteen to twenty-two scales before 

 the dorsal fin; length three and one-half to four and one-half times 

 depth " 270. 



270. Mouth rather large, with maxillary reaching to a point beyond front of 



eye; with a dark stripe along each side; Tennessee and Savannah Rivers 

 Hydrophlox ruhricroceus (Cope) Red Fallfish 

 (J\[otropis ruhricroceus (Cope) ) 

 Mouth smaller, maxillary not reaching eye; peritoneum black 27 L 



27 L With a fine dark stripe between the broad lateral stripe and the mid' 

 dorsal band; young with two dark crescents betw^een nostrils; 02,ark 

 region 



CoccoUs zonatus (Agassiz) Striped Minnow 

 (T^iotropis zonatus (Agassiz) ) 

 Dark stripes and bands less distinct; no dark crescents between nostrils; 



289 



