280 FISHES. 



5. C. monachus, Cope. SOLITARY CHUB. Similar, a 

 black spot on last rays of dorsal; a dark caudal spot; 

 eye small, 4 in head; lat. 1. 56. Holston R. 



\\\ Lateral line about 70. 



6. C. cataract, (Val.) Cope. NIAGARA GUDGEON. 

 Slender, depth (5 in length; head 4; D. I, 8; A. I, 8; 

 lat. 1. 70. Niagara Falls. 



9. RHINICHTHYS, Agassiz. LONG-NOSED DACE. 



= Argyreus, Hreckel (preoccupied). 



* Snout projecting considerably beyond the mouth ; body slender, 

 depth usually 5 to 6 in length; barbels evident. 



1. R. nasuius, (Ayres) Ag. LONG- NOSED DACE. 

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

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

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

 brooks. 



2. R. marmoratus, Ag. MARBLED DACE. Brown, 

 marbled; eye 2 in snout; head 4-j- in length; lat. 1. 70. 

 Great Lakes. 



** 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. atronasus, (Mitch.) Ag. BLACK- NOSED DACE. 

 Dusky, belly silvery; lateral band bright crimson in 

 spring, becoming orange in summer, black at other 

 times; fins often rosy in spring; depth 4f in length; 

 head 3f ; D. I, 8; A. I, 7; lat. 1. 65. New England to 

 Ohio Valley, in clear brooks; abundant Eastward. 



4. R. obtusus, Ag. BROWN- NOSED DACE. Similar; 

 sides with a brown band, edged above and below with 

 paler; head 4 or more in length; D. I, 8; A. I, 8; lat. 1. 

 63 to 70. Western streams. 



