40 CHECK LIST OF THE 



mouth very small, anterior, the maxillary not reaching the eye ; jaws sub- 

 equal ; eye large. Scales above dark edged, the outlines very sharply 

 defined; chin not black; a black stripe through snout and eye, a dusky 

 lateral shade and a small caudal spot. 



Length, two and a-hali' inches. 



As this species ranges from New York State westward to Assiniboia 

 it will no doubt be found in Ontario, but I have not yet seen it. 



(37) Notropis muskoka. 



Colour oli\aceous, darker above, very pale below; a dark band about 

 two-thirds diameter of eye around snout and on sides to base of caudal fin ; 

 on the snout this band is confined to the upper jaw ; between this band 

 and the darker colour on the dorsal region is a lighter band of about the 

 same width ; a dark vertebral line present, also a similar one from base of 

 anal to caudal fin. The lateral line is less developed in this species than 

 in any other of the genus. 



It differs from Notropis cayuga in the reduced size of the scales before 

 the dorsal fin, the more slender body, less blunt snout, and the slightly 

 larger and more oblique mouth and the more incomplete lateral line. It 

 is also a larger fish than Notropis cayuga. 



Twenty-four specimens \'arying in length from 1.31 to 2.83 inches 

 were taken from the lower part of Gull Lake, Muskoka, and from the 

 outlet just below the first falls. 



This species is new. It was discovered and taken by Dr. S. E. Meek 

 in September, 1899. 



(38) Notropis heterodon. 



Body moderately stout, the back somewhat elevated ; head rather 

 pointed, the snout acuminate; mouth oblique, lower jaw projecting; 

 lateral line usually more or less imperfect. Scales, 5-36-3. Teeth, 4-4, 

 often crenate. 



Colour olivaceous; chin black; a blackish rostral band; sides with a 

 dusky band. Length two and a half inches. 



Ranges from the St. Lawrence River westward. 



Subgenus ALBURNOPS. 



(39) Notropis fretensis. 



Slender, compressed ; mouth oblique ; eye three and a half in head ; 

 lateral line decurved. Scales, 6-35-3. Colour, olive, a plumbeous lateral 

 shade and dark spot at base of caudal. Length two and a half inches. 



This somewhat doubtful species is recorded by Jordan and I'"vermann 

 from the fireat Lake rcirion rmd Detroit Rivei. 



