316 Bulletin 47, United States National Museum. 



and Arkansas; not rare ; a most remarkable little fish, the only American 

 minnow with more than two barbels, (rerpa-, four ; vlj/ua, barbel.) 



Hyliopsis tetranemus, GILBERT, Bull. Washburn College Lab., 1886, 208, Elm and Sp ing creeks, 

 Medicine Lodge, Kansas. (Coll. Cragin.) 



521. HYBOPSIS jESTIVALIS (Girard). 



Head 3f ; depth 5fr. D. 8; A. 8j scales 6-36-4; teeth 4-4. Body slen- 

 der, with long caudal peduncle, the back scarcely elevated. Head long 

 and slender,the snout much projecting and rather pointed. Mouth mod- 

 erate, inferior, the maxillary reaching posterior nostril. Barbels con- 

 spicuous, nearly as long as snout, about 3 in head ; each maxillary with 

 but a single one. Eye small, 4 to 4^ in head. Fins rather long, the caudal 

 deeply forked, its lobes subequal ; dorsal over ventrals, nearer snout than 

 base of caudal. Color silvery ; everywhere sprinkled with small black 

 dots ; fins plain. Length 2i inches. Arkansas River to the Rio Grande, 

 abundant in sandy river channels, not in small brooks. (astivaUs, per- 

 taining to summer.) 



Gobio SRstivalis, GIRARD, Proc. Ac.Nat.Sci. Phila., 1856, 189, Rio San Juan, near Cadereita, 



New Leon. (Coll. Couch.) 

 Ceraiichythys sterletus, COPE, Zocil. Wheeler Survey, v, 652, 1876, (1876), Rio Grande, at San Ilde- 



fonso, New Mexico. (Type, No. 16973. Coll. Cope & Shedd.) 

 Ceratichthys sterletus and sestivalis, JORDAN & GILBERT, Synopsis, 216, 1883. 

 Hybopsis sestiyalis, JORDAN & GILBERT, Proc. U. S. Nat. Mus., 1886, 8. 



Represented in Central Texas by 



521a. HYBOPSIS JESTIVALIS MARCONIS, Jordan & Gilbert. 



Eye larger than in cestivalis, 3 in head ; caudal peduncle stouter than 

 usual, its least depth half greatest depth of body. Length 3 inches. 

 Abundant in Rio San Marcos, a clear stream issuing from an immense 

 spring at San Marcos, Texas; also known from the Guadalupe River, 

 near San Marcos, and the Rio-Comal at New Braunfels. 



Hybopsis Kslivalis marconis, JORDAN & GILBERT, Proc. U. S. Nat. Mus., 1886, 22, Rio San Mar- 

 cos, San Marcos, Texas. (Type, No. 36524. Coll. Jordan & Gilbert.) EVERMANN & 

 KENDALL, Bull. U. S. Fish Comm., xn, 1892, (1894), 104, plate 19, fig. 1. 



522. HYBOPSIS HYOSTOMUS (Gilbert). 



Head 4; depth 5|; eye 3ir. D. 8; A. 8; lateral line 37. Body and 

 head very slender; snout long, acute, projecting beyond mouth for half 

 its length; mouth short, wide, inferior; barbel long; pectoral large; 

 other fins small ; 13 scales before dorsal. Silvery, everywhere dusted 

 with dark specks ; fins pale, the lower lobe of caudal like the other. 

 Length 2 inches., Indiana to Iowa, and south to the Alabama River ; 

 rather common in sandy river channels, (vf, hog; ar6fta t mouth.) 



Nocomis hyostomus, GILBERT, Proc. U. S. Nat. Mus., 1884, 203, White River, Bedford, Indi- 

 ana. (Type, No. 34980. Coll. Gilbert.) 



523. HYBOPSIS GELIDUS (Girard). 



Head 4; depth 5; eye 6i; snout 2|. D. 8; A. 9; scales 6-44-4. Body 

 slender, not much compressed, back little arched ; head long and slender ; 

 mouth inferior, horizontal, broad, overhung by the very long, pointed 



