31. CYPRINID^ CLIOLA. 183 



caudal charged with satin-white pigment ; the fins otherwise all of a 

 clear, bright yellow. Females and young with the markings obscure, 

 the blue lateral band usually evident. Head 4^; depth 4f. D. 8; A. 

 8; scales 6-38-3; teeth 1, 4-4, 1. L. 3 inches. Alabama Basin. 



(Photogenis cceruleus Jordan. Ann. Lye. Nat. Hist. N. Y. 1876, 338: Codoma ccerulea Jor- 

 dan, Bull. U. S. Nat. Mus. xii, 52, 1878.) 



255. C. cBsIoristia Jordan & Brayton. 



Body short and deep, strongly compressed, the form elliptical, as in 

 C. pyrrhomelas, but rather deeper. Head rather small and pointed. 

 Mouth quite oblique, the maxillary not reaching the line of the orbit, 

 the upper jaw projecting beyond the lower, premaxillary on the level of 

 the pupil. Eye small, less than snout, 4 in head. Lateral line decurved. 

 Fins moderate. Nuptial tubercles covering the whole body, except the 

 space anterior to the ventrals and below the lateral line; those on the 

 body much smaller than those on the head. Coloration dark steel-blue; 

 a very distinct blue stripe along each side of caudal peduncle ; back clear 

 green; lower part of sides abruptly milk-white; black dorsal blotch large, 

 the lower part of the fin with bright pale-green pigment, the tip milky; 

 caudal dusky, its tips milky, its base pale ; anal and veutrals milky, a 

 faint dusky spot on last rays of anal ; iris white. Females slenderer and 

 less brightly colored ; no caudal spot. Head 4; depth 4. D. 7; A. 8; 

 scales 5-37-3 ; teeth 1, 4-4, 1. L. 3 inches. Saiitee Basin, South Caro- 

 lina. 



(Codoma chlorislia Jordan & Brayton, Bull. U. S. Nat. Mus. xii, 21, 1878.) 

 kk. No dark blotch on upper posterior part of dorsal. 



256. C. zonata (Agassiz) Jor. & Gilb. 



Physiognomy of Ceratichthys dissimilis. Body elongate, not elevated. 

 Head elongate. Mouth small, nearly horizontal, the maxillary reaching 

 beyond line of orbit, the mandible somewhat projecting. Eegion in 

 front of dorsal fin more or less bare of scales. Eye large, 3 in head. 

 Dorsal beginning opposite ventrals, nearer snout than base of caudal. 

 Olivaceous silvery below; a broad, silvery lateral band, with dark 

 specks ; sides of head with black specks ; a dark vertebral band. Head 

 4 ; depth 4^. D. 7 ; A. 8 ; scales 6-36-4 ; teeth 1, 4-4, 1. L. 3 inches. 

 North Platte Eiver ( Cope) ; Osage Eiver (Agassiz)* 



(Alburmis sonatus Putnam, Bull. Mus. Comp. Zool. i, 9, 1863 : Photogenis piptolepis 

 Cope, Hayden's Geol. Surv. Terr. Wyoin. 1870, 438 : Leudscua zonatus Giiutlier, vii, 

 253.) 



