8i6 FISHES — CYPEINID^. 



dusky ; a dark vertebral ]iDe ; a large black spot on the upper posterior part of the 

 dorsal; paired fine and lower part of the belly, as well as the tips of the anal and 

 candal, 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; head4J; depth 3f; 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 rajs 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. 



Gbnus 32. CHRIOPE. Jordan. 



Chriope, Jokdan, Bull. U. S. Geol, Snrv. Terr., 1878. 

 Type, Hybopsis bifrenatus, Cope. 

 Etymology, chreia, want ; ope, aperture, from the imperfections of the lateral line. 



Body moderately elongate ; month 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; dersal fin over vanlrals; anal fin short; species of 

 small size differing from Hudaonina chiefly in the incomplete condition of the lateral line. 



But two species are knswn, G, Ufrenate (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. 



IVorthern Chriupe. 



Alburnopa heterodon, Cope, Proc. Acad. Nat. Sci. Phila., If64, 281. 

 jSybopaie heterodon. Cope, Trans. Am. Philos. Soc , 18(i6, 382. 

 Leuciacus heterodon, Gunthkr, Cat. Fishes Beit Mus., vii, 261. 

 Hemiiremia heterodon, Jordan, Man. Vert., 2d. Ed., 1878, 303. 



Deacription — 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 ; depth 4 ; 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 3^ inches. 



Habitat, Michigan to Wisconsin. 



Diagnosis. — From other small minnows with large scales, this plain 

 species may be known by the incomplete lateral line. 



