44 CHECK LIST OF THE 



Colour, dark steel blue above ; pale or silvery below. A more or less 

 evident black spot at base of dorsal in front ; the fins otherwise all plain. 

 Males with the anterior dorsal region and the head profusely covered w^ith 

 small whitish tubercles, the belly and lower fins being of a bright brick 

 red in the spring. Females very pale olive, sometimes almost colourless. 



This species is recorded by Dr. Tarleton H. Bean as ranging from 

 Western New York to Minnesota. It should therefore be found in the 

 waters of Western Ontario, but as yet I have not seen it. Our form would 

 probably be N. u. lythrurus. 



Genus RHINICHTHYS. (Black-nosed Dace.) 



Body moderately elongate and little compressed, with usually stout 

 caudal peduncle and long, conical nose ; head rather large, sometimes 

 broad and flat above; eye small; mouth small, subinferior, the upper jaw 

 fixed by the union of the upper lip to the skin of the forehead ; end of 

 maxillary with small barbel. Teeth, 2, 4-4, 2 (sometimes 2, 4-4, i), those 

 of the principal row usually hooked, without grinding surface. A short 

 intestinal canal ; scales very small ; lateral line decurved, continuous ; 

 dorsal origin slightly behind ventral ; base of anal short. Small fishes 

 inhabiting clear, cold, brooks and streams. 



(49) Long-nosed Dace. Niagara Gudgeon. 



(Rhinichthys cataractae.) 



Body elongate, subterete ; caudal peduncle stout ; head moderate ; eye 

 rather aJDOve median; mouth horizontal, small, placed under the snout, the 

 lower jaw the shorter; upper lip thick; barbel evident but small; caudal, 

 large and well forked; scales, 13-57 to 65-TO. Teeth, 2,4-4, - three of the 

 principal row hooked. D. II., 7; A. II., 6; V., 8; P., 12. 



Colour, dusky olive, the back darker, below pale, some of the scales 

 mottled irregularly with dark and olivaceous, no black lateral band in the 

 adult, but in the young there is a trace of a dusky band. Males in the 

 spring have the lips, cheeks and lower fins crimson. Length, about five 

 inches. 



This species is found from the Niagara River to Lake Superior. It 

 is not uncommon at Sault Ste. Marie. 



Black-nosed Dace. ( Rhinichthys alronasus. ) 



(50) Black-nosed Dace. 



(Rhinichthys atronasus.) 



Body long, somewhat stout ; head small, conical ; eye small ; mouth 

 small, slightly oblique, with nearly equal jaws ; the maxillary barbel small 



