ROSY-FACED MINNOW. 817 
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. Rafinesque. | 
? Notropis, RAFINESQUE, Amer. Monthly Mag., ii, 1818, 209 (nomen ineptum). 
Minnilus, RAFINESQUE, Ich Oh., 1820, 45. 
Alburnellus, GIRARD, Proc. Acad. Nat. Sei. Phila., 1856, 193. 
Episema, COPE and JORDAN, Proc. Acad. Nat. Sci. Phila., 1877, 77. 
Type, Minnilus dinemus, Raf. 
Etymology, from the vernacular Minnow; Frerch, menuise; Latin, minus, small. 
Body elongate, somewhat compressed ; mouth 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 continuous, somewhat decurved ; exposed surface of scales 
broad ; dorsal fin over or behind ventrals; anal basis elongate, its rays eight to twelve 5 
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 WNotropis for this genus, for the following 
reasons: 1. The typical speciesis not certainly identified. Itis perhaps as likely to 
have been Notemigonus chrysoleucus as Minnilus dinemus. 2. Even if the identification 
were certain, the name Notropis is subject to rejection as an inept name, as the back is 
notat all keeled in any species. 
ANALYSIS OF SPECIES OF MINNILUS 
*Dorsal fin inserted well behind ventrals ( Minnilus). 
a. Head proportionately long, 3 4-5 in length; body compact; eye moderate, 4 in 
head. : : 6 RUBRIFRONS. 69. 
aa, Head Bt atatole al 4% in eee body elongated, compressed ; eye 
large, 3% in head. 5 ° : 6 DINEMUS. 70. 
aaa. Head moderate, 44 in length; eye large, 34 in Head: body compressed. 
PHOTOGENIS. 71. 
**Dorsal fin inserted directly over ventrals (Hpisema). 
b Eye extremely large, 2 3-5 in head ; anal rays 9. : ° ARIOMMUS. 72. 
bb. Kye large, 3 in head; anal rays 8. : 5 6 SCABRICEPS. 73. 
69. MINNILUS RUBRIFRONS (Cope) Jordan. 
Rosy-faced Minnow. 
Alburnus rubrifrons, CoprE, Proc. Acad. Nat. Sci. Phila., 1865, 85; Trans. Am. Philos, 
Soc., 1866, 388. 
Leuciscus rubrifrons, GUNTHER, Cat. Fishes, Brit. Mus., vii, 1868, 255. 
Minnilus rubrifrons, JORDAN, Man. Vert., Ist 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 
