50 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY III. 



Genus CODOMA Girard. 

 33. CoDOMA STIGMATURA Jordan. 



Photogenis stigmaturus Jordan (1877), Ann. Lye. Nat. Hist. N. Y.337. 



This elegant species is very abundant in the tributaries of the Eto- 

 wah, Oostanaula, and Coosa. In those streams which are neither very 

 clear and cold nor very muddy, it is usually the most abundant species. 



34. CoDOMA CALLiSTiA Jordan. 



Photogenis callistius Jordan (1877), Ann, Lye. Nat. Hist. N. Y. 337. 



A large, ornate species, more brilliantly colored than the preceding, 

 but less graceful in form. Female specimens are dull dark olive, with 

 the dorsal fin brick-red. This species occurs with the preceding, but is 

 rather less abundant. 



35. CoDOMA TRICHROISTIA Jordan & Gilbert, sp. nov. 



A small, slender species, graceful in form and elegant in coloration. 

 It is most nearly related to C. calUstia, but may be readily distinguished. 



Body rather slender, considerably compressed, the depth 4^ in length. 

 Head rather slender and pointed, 4^ in length. Eye of moderate size, 

 3^ in head. Mouth quite large, very oblique, the maxillary extending 

 to opposite the anterior margin of the eye, and the premaxillaries 

 being on a level with the middle of the pupil, the mouth thus being 

 similar to that of the species of Notropis. In C. caUistia, the mouth is 

 much more interior, nearly horizontal; the niaxillaries do not extend to 

 the eye, and the premaxillaries are entirely helow the level of the orbit. 



Scales rather closely imbricated, G-42-3 ; lateral line considerably 

 decurved, usually with an abrupt angulation between pectorals and ven- 

 trals; 18 or 19 scales before dorsal lin (15 or IG in C. calHstia). 



Fins moderately developed : dorsal well behind ventrals, rather nearer 

 caudal than muzzle. Dorsal I, 7. Anal I, 9. Pectorals falling some- 

 what short of ventrals; the latter reaching beyond vent nearly to base 

 of anal. 



Color: Bright steel-blue above : sides bright silvery ; in males, more 

 or less milky. A large black spot at base of caudal, precisely as in G. 

 calUstia, not nearly so distinct as in G. stigmatura. Head silvery; above 

 bluish. Dorsal fin with a broad, dusky, horizontal band at base; the 

 membrane of the last rays above jet-black, blacker than in the other 

 species; the tip of the fin milk-white. The rest of the dorsal fin, espe- 



