186 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY - IV. 



ttJ Species ..fMnall si/.e, \\illi the scales not much deeper than long, loss closely 

 iinl>ri<-at<-<l : limly oblong or elongate, litt lc elevated ; mouth 

 moderate, oblique or hori/outal ; dorsal (in inserted close be- 

 liind ventrals; nuptial colors mostly lirilliaut (AlJjruxors 



Grd.). 



roseux, nihricrncfiix, Jiitipiiniix, oklorocephalus, clii!iti<'iix, cliiili/lxru*, 

 cltroKomiix, SH in>i'fj>li<iliix, jiliuitht-dlux, Inwrlvxux, xhumurdi, lilt iiniux. 

 tt Teeth without evident grinding surfaee. 



a. Teeth with the edges serrate ; scales closely imbricated ........ rrrcoxti<jin<i. 



tin. Teeth not serrate; scales loosely imbricated, scare. ly higher than long. 

 b. Dorsal liii inserted directly over the ventrals; anal rays 7-9 ; eye very 

 large; scales large ("Ei'isK.MA" Copt- &, Jordan). 



arwtitiHHN, xi-nlrii'ciin, jijinui*, 

 ll>. Dorsal inserted behind ventrals ........... ultijtitnnx, <inttil:ilix, 



** Scales small, aboul ."1.1 in the lateral line ................ birittatus, 



Aual I'm nior,- or less elongate, its rays 10-14. 



c. Scales comparatively small, more or less closely imbricated, and with 

 the exposed edges deep, as in t'oiloinn and I,nsilun; scales iu 

 front of dorsal small; teeth with grinding surface more or 

 less developed. (LYTHRVIU'S Jordan.) 

 d. A black spot at base of dorsal in front. 



ciiaiuirriihtilH*, alrijH-x, ilijiJirmiHx, ardcnx, iiiinctiilutu*. 

 dd. A black spot at the upper anterior part of dorsal ....... rubripinn/U. 



dil'l. No distinct black sjiot on the dorsal. 



e. Body short and deep ...................................... lirUnf. 



ee. Body slender and elongate ....................... maliitiitux, Unix. 



cc. Scales comparatively large, not higher than long, and not closely im- 

 bricated ; scales in front of dorsal l.ii-^i ; I eet !i v, il limit grind- 

 ing surface. (MiNMLUS.) 

 /. Anal lin long, with about 1-4 rays . ..................... olitja*]>ig. 



ff. Anal iin moderate, its rays 10 or 11. 



g. Scales above lateral line in about 9 series .......... umbnililis. 



<jg. Scales above lateral line in 5-7 scries. 



/i. Ventral fins reaching beyond middle of dorsal. 



eoepticiu, photogenis, it lrs:-i>]>*, xiilliinx, percobromuf, m- 

 bclltix, (Hiirntiix, riibriJri'Hx, j<ir:(inttt<. 

 /i/i. Ventral fins scan d\ n aching beyond front of dorsal. 



in i' rn }i 1 1 ri/j . 

 * Anal fin slu.it, its rays 7-9 (rarely 10). 



* Scales I.-M-C . '.\rt-5Q in the lateral line. 



t Teeth \\ itb the gi hiding surface more or less developed. 



(Species attaining a lar.^e si/.e, \\ith llie scales along (bethinks nearly 



twice as deep as long, and so closely imbricated that the exposed sur- 



face- are \ i TV narrow ; back ele\ aled and convex in the adult male ; 



t lie lower jaw included; dorsal tin inserted direct 1\ npposhe \ entrals. 



i LvxUut K'af.*) 

 II. roriniliis ! Miiehiih .1. A Or. Shiner; Hnifm: Daoe. 



rltum:itr in (he \oiiii^, in the adult short, compressed, with 

 the :iiitrrior dor-:d iv-ion much swollen and jililmns. Head rather 

 he.i\\, CMiii|ireed, 1'oiilided l)et\veell the eyes, the snout bllllltish. 

 Mouth moderate, nearly hori/ontal, the jaws ni-arly equal, the lo\\er 

 sotnev.hal included. Kve moderate, \~:> in head, maxillary scarcely 



i, I?: 

 llitcli. ^Irom Latin /ur, light "Sbiiier".) (:= Hypxiltpiii Baird.) 



