42 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY — III. 



Compared with P. niveus, P. leucopus Las a different form, tlie dorsal 

 region is less elevated, and the nuchal region less dei)ressed. The mouth 

 is larger, the maxillary extending to nearly opposite the eye, instead of 

 falling sbort. The eye is larger and the mouth is less inferior in P. leu- 

 eopus. The coloration is somewhat different. 



Fhotogenis leucopus also resembles Codovia cvrystoma^ but that species 

 has a heavier head, larger e;^'e, stouter body, and different dentition and 

 coloration. 



Genus CODOMA Girard. 



9. CODOMA EURYSTOMA Jordan. 

 Fhotogenis eurystomus Jordan (1877), Ann. Lye. Nut. Hist. 356. 



This is the most abundant Cyprinoid in the tributaries of the Chat- 

 tahoochee River. It frequents especially the cold streams, but does not 

 seem to be adverse to mud. In Suwannee Creek, a deep, cold, muddy 

 stream flowing tbrough the woods, this was almost the only species 

 obtained. 



Its life-colors are as follows : General color of Luxilus cornutus on body, 

 l)ut the sides with considerable coppery lustre. Dorsal fin with a sharp, 

 black, horizontal bar about half-way up. In young fishes, this bar is 

 red. Tbe fin above is somewhat milky; below, it is pale. There is a 

 small, but distinct, round, black, caudal spot. Tlie caudal fin is cbiefly 

 of a rather dull ferruginous red. The base of the fin is pale, the tips 

 rather milky. The anal fiu is unmarked. There are gilt lines along the 

 back and sides. A dark humeral bar is usually present, and the upper 

 edge of the pectoral fin is largely black. 



The teeth of this species are usually 1, 4-4, 1, as at first described, 

 but we have found several individuals 1, 4-4, 2. This si)ecies resembles 

 somewhat Phoiogenis leucopus^ but it is stouter every way, with deeper 

 body, larger head, and much larger eye. 



10. CoDo:\rA Formosa (Putnam) Jordan. 



{Alburnus formosus Putnaiu, Leucisciis hiipseloptenis Giintber, Phologenis gmmUjnnni/i 



Jordan.) 



The typical specimens of P. grandipinnu are supposed to have beer, 

 collected in Flint River. Leucisciis hypselopterus of Giintlier is doubtless 

 the same species. We follow Giinther in identifying Alburnus formosus 

 Putnam as the same, although there is little iu the very imperfect orig- 

 inal description to warrant it. 



