38 CONTEIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY III. 



the geuus in the presence of a single row of teeth and in the more ante- 

 rior position of the dorsal, which is scarcely at all posterior to the ven- 

 trals. It is, however, rather a Codoma than an Episema. 



Genus XOTEMIGONUS Rafinesque. 



13. NOTEMIGONUS AMERICANUS {L.) Jor. 



Xotemigonus ischanus Jordan (1877), Anu. Lye. Nat. Hist. 3G4. 



Very abundant everywhere in the Ocmulgee in still or deep waters. 

 Adult specimens have the lower fins yellow, tipped with scarlet. 



Genus CERATICHTHYS Baird. 



14. CERATICHTHYS RUBRiFRONS Jordan. 



Xocomis rubrifrons Jordan (1877), Ann. Lye. Nat. Hist. N. Y. 330. 



This handsome little fish was first described from the Ocmulgee River, 

 where it is abundant. It is also common in the Oconee. 



15. CERATICHTHYS BIGUTTATUS {Klft.) Girard. 



Abundant in the Oconee ; not noticed in the Ocmulgee. 



Genus SEMOTILUS Rafinesque. 



16. Se^jotilus cokporalis {Mit) Putnam. 



From a small brook, tributary to the Ocmulgee. In the South, this 

 species is almost confined to the smaller creeks and spring runs. 



CATOSTOMIDiE. 

 Genus MYXOSTOMA Rafinesque. 



17. Myxostoma CERViNUM {Cope) Jordan. 



The little "Jump Rocks" is very abundant at the Flat Shoals of the 

 Ocmulgee. 



18. Myxostoma papillosum {Cope) Jordan. 



Common in the Ocmulgee. 



Genus ERIMYZON Jordan. 



19. Erimyzon sucetta {Lac) Jordan. 

 From the Ocmulgee. 



