FISHES OF THE TENNESSEE BASIN. 67 



Color dark olive above, with a bluish lustre, many scales darker, as 

 is usual in this genus. Sides somewhat silvery. No dark lateral band. 

 A broad shade of deep rose color along the sides, below which most of 

 the belly is bright crimson, the red colors brightest anteriorly. 



Length of largest specimens about 4 inches. Numerous specimens 

 from the Elk River at Estill Springs, and from Stone RiVer at Mur- 

 freesboro'. This striking species resembles most G. elongata and G.pro- 

 riger. Both those species have much smaller scales (70 to 75 in thfe 

 lateral line iu elongata, 60 to 65 in proriger). The coloration is likewise 

 different, the two latter species having a dusky band along the sides, 

 the anterior half of which in elongata is red iu spring. G. elongata is 

 much more elongate, as is also G. proriger. The mouth appears largest 

 in G. estor. The distinction between G. proriger and G. elongata is per- 

 haps questionable. 



Genus NOTEMIGONUS Bafinesque. 



50. NOTEMIGONUS CHRYSLOLEUOUS {Mit.) JoY. 



Common in still waters in the Tennessee Basin. 



Genus PHENACOBIUS Cope. 



57. PHENACOBIUS XJRANOPS Copc. 



, Rather common iu the Elk and Chickamauga Rivers. A few speci- 

 mens from the French Broad. Originally described from the Holstoa 

 iu Virginia. 



Genus RIIINICHTHYS AgassU 



58. Rhtnichthys obtusus Agassiz. 



{lihinichihijs Jitnatus Cope.) 



This species is abundant in all clear rocky brooks and in outlets of 

 springs. 



Genus CERATICHTHYS Baird. 



59. CERATICHTHYS MONACHUS Cope. 



Abundant iu Cbickaraauga River. Originally described from the 

 riolstou. 



CO. CERATICHTHYS DISSIMILIS {Kirt.) Cope. 



Obtained in Elk River. 



