FISHES — CYPEINID^. 



Description. — Body slender, little compressed, the back elevated, the caudal peduncle 

 stout; head stout, the muzzle elongate, obtusely decurved, heavy; mouih small, in- 

 feiior, horizontal, the maxillary not reaching to the eye; lips weakly plicate; isthmus 

 wide ; lateral line nearly straight ; eye large, high up, three and a half in head ; pale 

 Tellowish, the scales above dark-edget^; snout blackish ; a plumbeous lateral band; fins 

 plain ; head 4| ; depth 4 J ; D. 8 ; A^ ; scales 6-43-5 ; teeth 4-4. Length 3i inches. 



Habitat, West Virginia to the Eio Grarde, 



Diagnosis. — From other small minnows, this species may be known by 

 the thickened lips, in connection with the short intestines and the num- 

 ber (44) of the teeth. 



Habits. — This species has not yet been recorded from Ohio. P. teretulus 

 occurs in the streams of West Virginia, and P. icojpiferus which I take to 

 be the same species or a variety of it is found in Illinois. We may there- 

 fore look for it in the streams of Southern Ohio. Little distinctive is 

 known of the habits of this species. Professor Cope found it in the 

 Kanawa, abundant in the river channel and in the mouths of tributaries. 



Genus 38. RHINICHTHYS. Agass-z. 



Argyreus, Hkckel, Enssegger's Eeisen, 1843, i, 1040 (preoccupied in Entomology). 

 Bhinichthys, Agassiz, Lake Superior, 1850, 350. 



Type, Cyprinu) aironasua, Mit ch. 



Etymology, rhin, snout ; ichthua, fish. 



Body rather elongate, not much ooropress^ed ; month small, subinferior, normal ; the 

 upper jaw not protractile ; the upper lip contiLuong with the skin of the forehead ; a, bar- 

 bel terminal, on the maxillary ; teeth usually 2, 4-4, 2, hooked, without grinding sur- 

 face ; intestinal canal short ; scales very small ; lateral line continuous ; dorsal fin inserted 

 behind the ventrals ; anal basis short ; coloration dark, rosy in spring. 



Species of rather small size, abounding in all clear brooks in the United States, east 

 of the Eocky Mountaits. 



Analysis of Species op Ehinichthys. 



'Body elongate, the depth about 5 in length ; barbel rather long ; snout much pro- 

 jecting. ....... CATARACTS. T8. 



*'Body compact, the depth 4 to 4i in length ; barbel minute ; snout little projecting. 



ATRONA8U8. 79. 



78. E.HINICHTHYS CATABACTiE (Valcnciennes) Jordan. 



Long-nosed Dace; miag-.ira Gudg^eon. 



Goiio cataraclce, Cuv. and Val., Hist. Nat des Poissons, xvii, 1842, 315, pi. 483. 

 Ceratiehthys caiaracice, Cope, Trans. Am. Philos. Soc. Phila., 1866, 365.— Gunthek, Cat. 



Fishes Brit. Mus., vii, 176. 

 BUnicMhya cataraclce, Jordan, Man. Veit., 2d ed., 1878, 307, and elsewhere. 

 Lmdaeua naautus, Aybes, Host. Journ. Nat. Hist., iv, 1843, 2, 99, and of authors. 



