FISHES OF THE TENNESSEE BASIN. 67 



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

 is usuaHn 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 the 

 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 in 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 Eafinesque. 

 56. NOTEMIGONUS CHRYSLOLEUOUS (Mit.) Jor. 

 Common in still waters in the Tennessee Basin. 



Genus PHENACOBIUS Cope, 

 57. PHENACOBIUS URANOPS Cope. 



Rather common in the Elk and Chickamauga liivers. A few speci- 

 mens from the French Broad. Originally described from the Holston 

 in Virginia. 



Genus RIIIXICHTHYS Agassis. 



58. RHINICHTHYS OBTUSUS Agassiz. 



(Ithinichthys lunatus Cope.) 



This species is abu?idant in all clear rocky brooks and in outlets of 

 springs. 



Genus CERATICHTHYS Baird. 



59. CERATICHTHYS MONACHUS Cope. 



Abundant in Cbickamauga River. Originally described from the 

 Dolstou. 



60. CERATICIITHYS DissiMiLis (Kirt.) Cope. 



Obtained in Elk River. 



