320 Bulletin 47, United States National Museum. 



631. HYBOPSIS HYPSINOTVS (Cope). 



Head 3f; depth 4. D. 8; A. 8; scales 5-40-3; teeth 1, 4-4, 1. Body 

 stouter, more elevated, and more compressed than in H. rubrifrons. Head 

 short, broad above, much smaller and more conical than in H. rubrifrons ; 

 outline of back rather abruptly declining behind front of dorsal fin, so that 

 the base of the fin is oblique. Mouth inferior, horizontal, small, the max- 

 illary reaching line of orbit. Barbels small. Eye small, 3i in head. 

 Color silvery, with a double series of black specks along lateral line, and 

 a lateral band of dusted blackish, which passes through eye and snout and 

 ends in a faint caudal spot ; males with the fins bright red, and the body 

 with a deep violet luster, as in Notropis rubricroceus. Length 3 inches. 

 San tee Basin, in North Carolina and South Carolina; rather rare. Resem- 

 bles Notropis procne, but has an evident barbel, (tyi-, high ; vwrof , back.) 



Ceratichthys hypsinotus, COPE, Proc. Amer. Phil.Soc. Phila., 1870, 458, tributaries of Catawba 

 River, McDowell County, North Carolina. (Coll. Cope.) JORDAN & BRAYTON, Bull. 

 U. S. Nat. Mus., xn, 1878, 25, and JORDAN & GILBERT, Synopsis, 215, 1883. 



582. HTBOPSIS RUBRIFRONS (Jordan). 



Head 4; depth 5. D. 8; A. 7; scales 5-36-3; teeth 1, 4-4, 0. Form of 

 Hybopsis amblops. Head long, narrower than in H. amblops. Eye moder- 

 ate, 3i to 3 in head, wider than the interorbital space. Mouth small, 

 inferior, overhung by the bluntly decurved but not very broad muzzle ; 

 barbels quite long and distinct, 13 scales in front of the dorsal. 

 Fins well developed ; the first rays of the dorsal about twice height of 

 last. Pale olivaceous ; sides with a plumbeous silvery band, in some 

 specimens forming a stripe through eye and snout, and a dark spot at base 

 of caudal ; cheeks silvery ; snout in males red, with numerous dust-like 

 tubercles ; specimens in high spring coloration have the fins largely red. 

 Length 3 inches. Basin of the Altamaha, Georgia ; common, (ruber, red ; 

 /rows, forehead.) 



Nocomis rubrifrons, JORDAN, Ann. Lye. Nat. Hist. N. Y., 1876, 330, Ocmulgee River. Flat 



Shoals, Georgia. (Type, Nos. 17863 & 20146. Coll. Jordan.) 

 Ceratichthys rubrifrons, JORDAN & GILBERT, Synopsis, 214, 1883. 



533. HYBOPSIS AMBLOPS (Kafinesque). 

 (SILVER CHUB.) 



Head 4 ; depth 5. D. 8 ; A. 7 ; scales 5-38-4 ; teeth 1, 4-4, 1. Body 

 rather slender, somewhat heavy anteriorly, not much compressed. Head 

 large, flattened and broad above ; eye very large, longer than snout and 

 longer than interorbital space, 3 in head. Mouth horizontal, subinferior, 

 and rather small; muzzle bluntly decurved; upper lip below level of 

 orbit ; maxillary not reaching line of front of orbit ; barbel evident. 

 Fins moderate. Lateral line somewhat decurved ; sixteen scales before 

 dorsal. Color translucent greenish ; scales somewhat dark-edged ; sides 

 with a bright silvery band which overlies dark pigment, so that some- 

 times a plumbeous or even blackish band appears ; a dark band through 

 eye around snout ; males without tubercles or red coloration. Length 2 



