LAMPREYS AND FISHES OF INDIANA. 205 



Distributed from Indiana to Southern Mississippi, Texas and Iowa. 

 Tippecanoe River at Lafoyette Cope, (18, 381); New Harmony (Hay) ; 

 Vincennes and Posey County (4, '88, 162) ; Lawrence County (23, '84, 

 200) ; Carroll County {23, '6>^, 46) ; Owen County (2^., '93, 86) ; Vigo 

 County {16, '94). Cope's types of th's fish were described from trib- 

 utaries of Lake Michigan and of the Wabash River (IJ^, No. 2, 56). 

 Appears to prefer clear streams. Nothing distinctive is known regard- 

 ing its habits. 



Genu* NOTROPI> KmI. 



Alimentary canal short, and peritoneum pale. Teeth various, 4-1, or 

 1, 4-4, 0, or 1, 4-4-1, or 1, 4-4, 2, or 2, 4-4, 2 ; with or without grind- 

 ing surface. First rudimentary ray of dorsal closely bound to the next 

 ray. Bones of head not conspicuously excavated by mucous channels. 

 Lateral line usually, but not always complete. 



A genus containing a large number of species, many of them variable 

 and difficult of determiuati-n They are usually of small size, but 

 abound in individuals, and constitute most of the schools of " minnows'' 

 which are seen in our streams. 

 a. Teeth in main row, four; in inner r<.w, none or one. 



b. Scales on the sides not closely imbricated, their exposed edges 

 about as wide as high. Dorsal fin situated over the ventrals. 

 Anal rays, seven or eight. 

 c. Teeth, 4-4; no inner row. 



d. Mouth small and slightly inferior. 



e. Depth in length, five. mkrostomv-i, p 206. 

 ee. Depth iu length, about thne and three-fourths to 



four and one-fourth. >^cyUa, p 206. 



dd. Mouth terminal. 



f. Mouth obli(|iie ; depth in length, five. 



freniei)m, p. 206. 

 fi". Mouth very oblique; depth, four and one-half; 

 lower jaw included. anogenus, p 207. 



ffi\ Mouth little oblique ; depth, four; lower jaw pro- 

 jecting; chin black Jieterodon, p. 207. 

 fit!'. jNLouth small; chin not black. cayuga, p. 208. 

 cc. Teeth, 1, 4-4, 0, or 1, 4-4, 1, or 1, 4-4, 2. 



g. Mouth terminal, very oblique. Head in the length 



less than four. hoops, p. 209. 



gg. Mouth nearly inferior. Head in length more than 



fQur. • huclsonms, p. 209. 



bb. Scales closely crowded, so that the exposed edges are much 



higher than wide, (This character not so evident in the 



young fishes.) Teeth serrated. 



