31. CYPRINIDJE CLIOLA. 181 



Jill. Teeth -without distinct grinding surface. 

 j. Anal fin short, of 8 or 9 rays. 



k. A conspicuous dark blotch on upper posterior rays of dorsal. 



1. Adult males with the vertical fins chiefly red; a conspicuous black 

 spot at base of caudal. 



251. C. calSistia Jordan. 



Body rather stout and compressed, rather heavy forward, the dorsal 

 outline considerably elevated. Head stout and rather blunt, its upper 

 part flattish ; the nuptial tubercles not numerous, arranged in a few dis- 

 tinct longitudinal rows, not scattered without order, as in related species. 

 Mouth large, nearly horizontal, slightly overlapped by the heavy snout, 

 the maxillary reaching nearly to the eye, the premaxillaries anteriorly en- 

 tirely below the level of the orbit. Eye large, 3f in head. Scales large, 

 not very closely imbricated, 16 in front of dorsal. Fins rather large, 

 the height of the dorsal in males nearly one-fifth of length of body. 

 Coloration dark and brilliant. Males with the back very dark steel- 

 blue ; sides a clear silvery violet ; belly and lower fins satin- white. A 

 heavy black blotch on posterior part of dorsal, extending downward and 

 forming a horizontal bar at the base of the fin ; the rest of the fin ver- 

 milion, except the milk-white tip. Caudal fin bright red, yellowish at 

 base, milky at tip ; a broad golden vertebral band and a reddish lateral 

 streak; a large, distinct, round black spot at base of caudal. Females 

 olivaceous, with less black ; the fins dull reddish. Head 4i ; depth 4f . 

 D. 8; A. 8 ; scales 5-40-3; teeth 1, 4-4, 1. L. 4 inches. Alabama Basin. 



(Pliotoyenis caUistins Jordan, Ann. Lye. Nat. Hist. N. Y. 1876, 337 : Codoma callistia Jor- 

 dan, Bull. U. S. Nat. Mus. xii, 52.) 



252. C. tricSairoistia Jor. & Gilb. 



Body rather slender, compressed. Head slender and pointed. Eye 

 moderate, 3f in head. Mouth quite large, very oblique, the maxillary 

 reaching the anterior margin of the eye, the premaxillaries on the level 

 of the middle of the pupil. Lateral line considerably decurved, usually 

 with an abrupt angulatiou between pectorals and ventrals. Nineteen 

 scales before the dorsal. Fins" moderate ; dorsal well behind ventrals. 

 Nuptial tubercles sparse on the head. Caudal peduncle and sides as 

 far forward as the ventrals tuberculate in spring males. Males bright 

 steel-blue above ; sides bright white ; a large black spot at base of cau- 

 dal, precisely as in C. callistia; dorsal fin with abroad, dusky, horizon- 

 tal band at base, the membrane of the last rays jet-black, the tip milk- 

 white, the rest of the fin of a bright, pale vermilion-red ; caudal rosy, 

 its tips white ; anal and ventrals milky. Females duller, but the black 

 markings distinct. Head 4-1 ; depth 4^ j scales 6-42-3 ; teeth 1, 4-4, 1. 



