860 FISHES — CYPEINID^. 



Analysis op Species of Cbratichthts. 



'Mouth Bubinferior ; scales large, about 36 In lateral line ; eye very large ; silvery 

 (subgenus ECybopsis). ...... amblyops. 87. 



**Mouth terminal ; scales medium, about 41 in lateral line; eye moderate; not 

 silvery (subgenus Ceratichthys) biguitatus. 82. 



81. Ceratichthys amblyops (Rafinesque) Girard. 

 Big-eyed Chub. 



var. amhlops. 

 Butilas amhhps, Kapinesque, Ich. Oh., 1820, 51. 

 Ceraiichihys ambUps, Girajid, Proc. Acad. Nat. Sol. Phila., 18.' 6, 213. — Jordan, Man. 



Veit., 2d Ed., 306. 

 Nocomis aniblops, Jordan, Ann. Lyo. Nat. Hist. N. Y., 1876, 328. 



var. gracilis. 



Hybopsia gracilis, Agassiz, Amer, Jonrn. Sci. Arts, 1854, 358. — Jordan, Ann. Lye. Nat. 



Hist. N. Y., 1876, 331. 

 GoUo vertialis, Girakd, Proc. Acad. Nat. Sci. Phila., 1856, lf8; U. S. Pao. R. B. Surv., 



18:.8, 249. 

 Sybopsis winchelli, Girard, Proc. Acad. Nat. Sci. Phila., 1856, 211. 

 Nbcomis winchelli, Jordan, Ann. Lye. Nat. Hist., 1876, 330. 

 Ceraiichihys winchelli, Jordan, Man. Vert., 2d Ed., 306. 

 Ceratichthys hyaliflus. Cope, Jonrn. Acad. Nat. Sci., Phila, 1868, 236 — Gunthbr, Cat. 



Fishes Brit. Mus., vii, 179, and of authors. 



Description. — Body moderately elongate, little compressed, heaviest anteriorly ; head 

 large, the muzzle rather long, the profile very blunt ; eye unusually large, larger than in 

 lEost of our minnows, its diameter about one-third the length of the side of the head ; 

 mouth rather small, inferior, horizontal ; barbels well developed ; fins moderate, the 

 dorsal inserted over the base of the ventrals ; scales large ; color translucent above, 

 sides and below bright silvery ; a plumbeoas lateral band, sometimes faint, sometimes 

 shining blackish ; top of head and a streak throngh the eye dark ; no vertebral band ; 

 fins unspotted ; males in spring not tuberculate and without red markings ; head 4 ; 

 depth 4f ; scales 5-40-3 ; D. 8 ; A. 8 ; pharyngeal teeth 1, 4-4, 1. Length 3 inches. 



Habitat, Mississippi Valley. Var. gracilis, Tennessee and southwards. 



Diagnosis. — This species may be known by the presence of a very 

 large eye in connection with the maxillary barbels and large silvery 

 scales. 



Habits. — This species is abundant in all tributaries of the Ohio River. 

 It frequents clear sandy or gravelly streams, and seeks the river chan- 

 nels rather than the small brooks. The male in spring, so far as known, 

 never becomes tuberculate, and the fine are never red, characters which 

 help to distinguish this species from its ornate southern relative, 

 Ceratichthys rubrifrons. 



