138 Illinois State Laboratory of Natural History. 



NOTKOPIS MACEOLEPIDOTUS, n. S. 



This fish, represented by a single specimen in our collections 

 from Illinois, closely resembles Notropis atripes, from which it 

 differs especially in the larger scales, and in the entire absence 

 of any blotch at the front of the base of the dorsal fin. It is 

 elliptical in outline, strongly compressed, its greatest thickness 

 being less than half its depth, the back making a uniform 

 curve from the front of the dorsal to the nostrils. Length 2.1 

 inches, depth 4.2 in length, caudal peduncle 4.6. Color in al- 

 cohol plain, the sides somewhat silvery, the opercles brightly 

 so; no dark vertebral line, but the scales upon the back and 

 upon the upper part of the sides thickly sprinkled with rather 

 large circular black specks; fins all plain; upper surface of the 

 head a little dusky, and thickly sprinkled with black. The 

 head is a compressed cone, 4.5 in length, upper surface convex; 

 snout regularly decurved, 3.5 in head; mouth rather large, ter- 

 minal, oblique; upper lip opposite the middle of the pupil; max- 

 illary to posterior margin of nostril; upper jaw 3.15 in head, 

 lower not projecting, 2.6 in head; teeth 4, 2 2, 4; eye large, 

 circular, 3.75 in head; dorsal fin I 8, about 4 scales behind 

 the ventrals; anal 11: scale formula 6 40 3, 19 before 

 dorsal. 



NOTROPIS ANOGENUS, n. s. 



This is a small, insignificant species, extremely similar to 

 Cliola heterodon with perfect lateral line, but clearly distin- 

 guishable from it in every case which I have observed, by iti 

 peculiar mouth, very small and extremely oblique, the lower 

 jaw standing at an angle of no more than 40 degrees with the 

 vertical. Length. 1.5 in., depth 4.33 to 4.5. Color dark above, 

 yellowish beneath, with a very distinct black lateral band ex- 

 tending from a small black spot at base of caudal along sides 

 to eye and around the nose. Within this band, a small black 

 blotch about each pore in the lateral line. No vertical bar 

 below eye. Back very dark, sometimes nearly black, the scales 

 being thickly specked with black on their lower exposed sur- 

 face, but only narrowly edged with dusky for one or two rows 

 of scales above the lateral band. Edge of lower jaw also 

 with black: fins all dusk. Head dark above white 



