CYPRINID^. — cviir. • 307 



brightly colored species allied to this occur farther 

 South. 



** Mouth termiual; teeth 2, 4—4, 2; size large; dorsal very 

 slightly behind ventrals. (Geuus Couesius, Jor.) 



7. C. prosihemius, Cope. Lake Chub. Depth 5 

 in leng-th, equal to length of head; eye 4 in head; 

 snout blunt; mouth small; dusky above, sides plumbeous; 

 lat. 1. 63; L. G to 7. Great Lakes. 



8. C. milneri, Jordan. Milker's Chub. Depth 4|- 

 in length, equal to head; head flattish above, with a 

 broad snout which projects over the large oblique 

 mouth; barbel well developed; eye large, of in head; 

 D. I, 8; A. I, 8; lat, 1. 08; scales crowded forwards; 

 colors of Sernotilus corporalis^ but the fins unspotted. 

 Lake Superior. 



22. RHINICHTHYS, Ag^^^iz. Long -Nosed Dace. 

 = Argyreus^ Heckel (preoccupied.) 



* Snont projecting considerably beyond the mouth; body slender, 

 depth usually 5 to 6 in length ; barbels evident. 



1. R. cataractcB, (C. & V.) Jor. Long - Nosed Dace. 

 Brownish, mottled, not banded; eye half tlie length of 

 the long snout; head 3^ in length; D. I, 8; A. I, 7; 

 lat. 1. 63; L, 5. New England to Va. and Wis., in clear 

 brooks. \^R. nasutus^ (Ayres) Ag.] 



2. R. marmoratus, x\g. Marbled Dace. Brown, 

 marbled; eye 2^ in snout; head 4:^ in length; lat. 1. 70. 

 Great Lakes. (Doubtfully distinct.) 



** Snout scarcely projecting; body stout; depth 4 to 5 in length; 

 barbels scarcely visible. 



f A distinct dark band from snout to caudal (red in spring.) 



3. R. afronasus, (Mitch.) Ag. Black -Nosed Dace. 

 Dusky, belly silvery; lateral band bright crimson in 



