816 FISHES—CYPRINIDAZA. 
dusky: a dark vertebral line; a Jarge black spot on the upper posterior part of the 
dorsal; paired fins and lower part of the belly, as well as the tips of the anal and 
caudal, and the front and upper parts of the dorsal charged with clear satin-white pig- 
ment in males in spring; in full breeding dress the dorsal pigment with a greenish 
lustre ; no creamy band at base of the caudal; males with the head and front covered 
with small tubercles; head 44; depth 32; D.8; A. 8; scales 5-38-3; teeth 1, 4-4, 1 the 
edges more or less distinctly serrate. Length 4 inches. 
Habitat, Ohio Valley, Great Lake Region, and eastward. 
Diagnosis.—The dark blotch on the last rays of the dorsal sufficiently 
distinguishes this elegant fish from all others found in Ohio. 
Habits—This species abounds in all the clear streams in the State of 
Ohio. The male in the breeding season is one of the most beautiful of 
our minnows, on account of the satin-white lustre of its sides and fins. 
It is therefore desirable as an aquarium fish. The species is not used 
for food. 
GEeNus 32. CHRIOPE. Jordan. 
Chriope, JORDAN, Bull. U.S. Geol. Surv. Terr., 1878. 
Ty pe, Hybopsis bifrenatus, Cope. 
Etymology, chreia, want; ope, aperture, from the imperfections of the lateral Jine. 
Body moderately elongate; mouth normal; no barbels; teeth 4-4, with grinding sur- 
face and hook, the edges more or less crenate; scales large, not closely imbricated ; 
lateral line wanting posteriorly ; dorsal fin over ventrals; anal fin short; species of 
small size differing from Hudsonius chiefly in the incomplete condition of the lateral line. 
But two species are known, U. bifrenate (Cope), of the Eastern and Middle States, a 
handsome little fish with a jet-black burnished lateral band, and the following. 
68. CHRIOPE HETERODON (Cope) Jordan. 
Northerm Chriope. 
Alburnops hetercdon, COPE, Proc. Acad. Nat. Sci. Phila., 1°64, 281. 
Hybopsis heterodon, Corps, Trans. Am. Philos. Soc , 1&66, 382. 
Leuciscus heterodon, GUNTHER, Cat. Fishes Brit Mus., vii, 261. 
Hemitremia heterodon, JORDAN, Man. Vert., 2d. Ed., 1878, 303. 
Description —Body moderately stout, the back compressed and elevated; head rather 
pointed, the muzzle acuminate ; mouth oblique, the lower jaw projecting, the upper 
lip opposite the upper rim of the pupil; maxillary extending to opposite front of orbit ; 
thirteen scales in front of dorsal; eye three in head ; color olivaceous; a blackish dorsal 
band; sides with a leaden or dusky band; head 4; depth4; D.8; A. 8; scales 5-36-3; 
the lateral line extending about half the length of the body; teeth 4-4, often crenate. 
Length 24 inches. ‘i 
Habitat, Michigan to Wisconsin. 
Piagnosis—From other small minnows with large scales, this plain 
species may be known by the incomplete lateral line. 
