S40 FISHES—CYPRINIDA. 
head jet black, with several large tubercles on the snout in spring, a dusky shade along 
sides of the caudal peduncle; head 44; depth 4; D. I, 7; A 7; lat. 1.47; teeth 45 
Length 24 inches. 
Habitat, Ohio Valley to the Upper Missouri, abundant. 
Diagnosis.— Among Ohio fish, this small species may be known at sight 
by the short, thick head and small mouth. 
Habits.—This species is most abundant in the small and often muddy 
brooks which flow directly into the Ohio River. It does not appear to 
like a sandy or gravelly bottom, and as it feeds on mud and Algz, it is 
seldom found in company with such species Hricymba and Chrosomus. 
GENUS 29. HYBORHYNCHUS. Agassiz. 
Hyborhynchus, AGassiz, Am. Journ. Sci. Arts, 1855, 233. 
Type, Minnilus notatus, Rafinesque. 
Etymology, hubos, gibbous; rhugchos, snout. 
This genus differs from Pimephales only in having the lateral line complete, and the 
“maxillary often provided with a rudimentary or obsolete barbel. The species are more 
elongate than those of Pimephales and reach a larger size. The coloration and nuptial 
dress is similar in the two genera. 
60. HyBoRHYNCHUS NoTATUS (Rafinesque) Agassiz. 
Blumt-nosed Winnow. 
? Minnilus notatus, RAFINESQUE, Ich. Oh., 1820, 47. 
Hyborhynchus notatus, AGAssiz, Am. Journ. Sci. Arts, 1855, 222.—Copx, Cyp. Penn., 1866, 
392; Journ. Phil. Acad. Sci., 1869, 235.—GuNTHER, Cat. Fishes, vii, 182.—JoRDAN, 
Bull. Baff. Acad. Sci., 1576, 94; Man. Vert , 2d Ed., 1878, 2&8, and of writers generally. 
? Hyborhynchus superciliosus, CopE, Journ. Phila. Acad. Sci. 1869, 234.—JORDAN, Man. 
Vert., 2d Ed., 1878, 289. (Specimens with an obsolete maxillary barbel.) 
Description.—Body rather elongate, not elevated, moderately compressed; head 
moderaie, the muzzle blunt and convex, top of the head depressed ; cheeks vertical ; 
mouth small, inferior, horizontal; fins small, the dorsal moderate, the first ray distinct 
and spine-like in the males, slender in the females; anal small; caudal short; scales 
moderate, deep, closely imbricated ; scales in front of the dorsal small and crowded ; 
eye moderate; color olivaceous, little silvery, sides bluish; a black spot on the dorsal 
fin in front, near the base; a dusky shade at base of caudal; males inspring with black 
on the dorsal more extended, and the head wholly black; snout with about fourteen 
disproportionately large tubercles; head 44; depth5; D.8; A.7; lat 1.44; teeth 4-4. 
Length, 4 inches. 
Habitat, Ohio Valley and Great Lake Regions, abundant. 
Diagnosis—The presence of a dark spot on the anterior rays of the 
dorsal distinguishes this plain species from all the others with long in- 
testines or teeth 4-4. 
