364 Fishes of Upper Georgia. 



form and coloration. Its relationships are entirely with P, 

 cceruleus, P. xcenurus, and other species placed in Photo- 

 gents, but the anterior dorsal necessitates its reference to 

 Episema. E. callisema resembles Cyprinella whipplei Grd., 

 having a similar dorsal fin, but the latter species, according 

 to Girard's description, has the dorsal nearer to the caudal 

 than the snout. It has also a longer anal fin, a larger eye, 

 and a deeper body, besides the presence of two rows of teeth. 



10. PHOTOGENIS XCENURUS. 

 Minnilns xcenurus Jordan, Proc. Phil. Ac. Sci., 1877, 79. 



This beautiful species is fully described in the paper above 

 cited. It is the most abundant species in the Ocmulgee 

 River, and we obtained hundreds of specimens. The males 

 are provided with rows of quite large tubercles along the 

 sides of the caudal peduncle — one on each scale — in addi- 

 tion to those which are found upon the head and neck. The 

 bases of the pectorals, ventrals, and anal, are filled with white 

 pigment, as are the tips of the dorsal and caudal. The col- 

 oration in general resembles that of P. callistius, but the 

 black caudal spot is obsolete, and the size is much smaller* 

 I at first identified this with P. pyrrhomelas Cope ; but a 

 comparison with Cope's types shows several points of differ- 

 ence. 



11. NOTEMIGONUS ISCHANUS. Sp. nov. 



A species of this genus, for which the above name is pro- 

 posed, is very abundant in still waters in the Ocmulgee 

 River. It differs from JV". americanus in the extreme com- 

 pression of the body, and in the longer anal fin. 



Head rather long and slender, depressed and fiat between the eyes, more 

 pointed than in N. americanus, and less rounded above, 4| in length. 

 Mouth longer and less oblique. Eye very large, white, much larger than 

 in americanus, about 3 in head (nearly i in americanus of the same size), 

 the maxillary reaching eye. 



Body elongate ; depth 3| in length ; excessively compressed, perhaps 

 more so than in any other Cyprinoid whatever; the greatest thickness 

 being less than the thickness of the head, and less than half the length of 

 the head. Back and belly closely compressed. 



