34 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY ITT. 



III. WATER-BASIN OF THE ALT AM AH A RIVER. 



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

 Altamaba, exclusive of the Shad (Alosa sapidissima), which ascends all 

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

 four are known only from the Oconee and Ocmulgee, viz, Nothonotus 

 inscriptus, Hydrophlox lutipinnis, Codoma callisema, and 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 inscriptus, Microptems scdmoides. Hydrophlox lutipinnis, Cerat- 

 ichthys rubrifrons, and Ceratichthys biguttatus. The other species men- 

 tioned below are from the Ocmulgee. 



ETHEOSTOMATIDJE. 



Genus HADROPTERUS Agassiz. 

 1. HADROPTERUS NIGROFASCIATUS Agassiz. 

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



Genus BOLEOSOMA DeKay. 



2. BOLEOSOMA MACULATICEPS Cope. 



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

 Macon, Ga. 



Genus NOTHONOTUS Agassiz. 



3. NOTHONOTUS INSORIPTUS, sp. nov. 



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

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



Head large, 4J 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 imb.ricated, the lateral line continuous and nearly 

 straight. Scales 5-46-5. 



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



