KOSY-FACED MINNOW. 847 



Habits. — This species was first described from Detroit River, and there- 

 fore it will probably be found in tributaries of Lake Erie in Ohio. Noth- 

 ing distinctive is known of its habits. 



Genus 33. MINNILUS. Rafineaque. 



f Notropis, Eapinesque, Amer. Monthly Mag., ii, 1818, 209 (nomen ineptum). ' 



Minnilua, Rafinesque, Ich Oh., 1820, 45. 



Alburnellus, Gikard, Proc. Acad. Nat. Sci. Phila., 1856, 193. 



Eplsema, Cope and Jordan, Proc. Acad. Nat. Sci. Phila., 1877, 77. 



Type, Minnilus dinemu8, Raf. 



Etymology, from the vernacular Minnow ; French, menuise ; Latin, minus, small. 



Body elongate, somewhat compressed ; month oblique, terminal, normal ; no barbels ; 

 teeth 2, 4-4, 2, hooked, with entire edges and no grinding surface ; scales thin, usually 

 large ; the lateral line continnous, somewhat decnrved ; exposed surface of scales 

 broad ; dorsal flu over or behind ventrais ; anal basis elongate, its rays eight to twelve ; 

 species of small size, graceful form and delicate coloration. 



Our species may be referred to two subgenera characterized as follows : 



Episema, Cope and Jordan. Dorsal fin inserted directly over ventrals. 



Minnilus, Rafinesque. Dorsal fin inserted well behind ventrals. 



It does not appear best to retain the name Notropis for this genus, for the following 

 reasons: 1. The typical species is not certainly identified. It is perhaps as likely to 

 have been Notemigonus ehrysoleucus as Sfinnilus dinemus. 2. Even if the identification 

 were certain, the name Notropis is subject to rejection as an inept name, as the back ia 

 not at all keeled in any species. 



Analysis of species of Minnilus 



•Dorsal fin inserted well behind ventrals (Minwilas). 

 a. Head proportionately long, 3 4-5 in length ; body compact ; eye moderate, 4 in 



head. ....... rubmfrons. 69. 



aa. Head proportionately small, 4f in length ; body elongated, compressed ; eye 



large, SJ in head. ..... dinemus. 70. 



aaa. Head moderate, 4i in length ; eye large, 3J in head ; body compressed. 



PH0T0GENI8. 71, 



•"Dorsal fin inserted directly over ventrals (Epismia), 

 t Eye extremely large, 2 3 5 in head ; anal rays 9. . . ariommus. 72. 

 hb. Eye large, 3 in head ; anal rays 8. . . . sgabricefs. 73. 



69. Minnilus rubeifkons (Cope) Jordan. 



Rosy-faced Minnow. 



Allnirnus rubrifrons, Cope, Proc. Acad. Nat. Sci. Phila., 1865, 85 ; Trans. Am. Philoe. 



Soc, 1666, 388. 

 Leuciseus, rubrifrons, Gunthek, Cat. Fishes, Brit. Mus., vii, 1868, 255. 

 Minnilus rubrifrons, Jordan, Man. Vert., 1st Ed., 1876, — . 

 Notropis rubrifrons, Jordan, Man. Vert., 2d Ed., 1878, 296. 



Description. — Body moderately elongate, the back scarcely elevated, the caudal pe- 

 duncle somewhat contracted ; head longer than in the other species, conic and 



