34 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY ITT. 



III. — WATER-BASIN OF THE ALTAMAHA RIVER. 



Twenty-three species are known to occur in tlie water-basin of tlie 

 AUamalia, exclusive of tlie Shad {AJosa sapidtsshna), which ascends all 

 the Southern rivers until prevented by the dams Of these twenty-three, 

 lour arc known only from the Oconee and Ocmulgee, viz, Nothonotus 

 i)iscriptus, Hydrophlox lutipinnis, Codom a calHsema, aud Codoma xcenura. 

 The others are chiefly species of general distribution. Five species were 

 obtained by the writers in the headwaters of the Oconee Eiver, viz, 

 Nothonotus inscriptufi, ]\Iicropieri(S salmoides. Ilydrophlox lutipinnis, Cerat- 

 ichthys ruhrifrons, aud Geratichthys Mguttatus. The other species men- 

 tioued below are from the Ocmulgee. 



ETHEOSTOMATIDiE. 

 Genus HADROPTERUS Agassis. 



1. HADROPTERUS NIGROFASCIATUS Agass'lZ. . 



Taken at the Flat Sboals in the South Fork of the Ocmulgee. 

 Genus BOLEOSOMA BeKay. 



2. BOLEOSOMA MACULATIOEPS Co])e. 



A specimen, apparently of this species, from the Ocmulgee Eiver at 

 Macon, Ga. 



Genus NOTHONOTUS Agassis. 



3. NOTHONOTUS INSCRIPTUS, Sp. 710V. 



Body rafher stout and deep, pretty strongly compressed behind, less 

 Ko anteriorly : depth 4f in length : caudal peduncle rather deep. 



Head large, 4| in length, rather obtuse, the profile quite gibbous : 

 a considerable angle formed opposite the eyes, which are high up and 

 rather close together. 



Eye about equal to snout, 3J in head. Mouth moderate, slightly ob- 

 lique, the maxillary reaching eye, the upper jaw the longer. Cheeks 

 and opercles entirely scaleless, as in N. tlialassinus. Eegion in front of 

 dorsal scaly: breast naked. Belly covered with ordinary scales. Scales 

 rather large, closely imbricated, the lateral line continuous and nearly 

 straight. Scales 5-46-5. 



Fins well developed. The spinous dorsal larger than the soft dorsal, 



