308 FIELD COLUMBIAN MUSEUM ZOOLOGY, VOL. i. 



3. Semotilus atromaculatus (Mitchill). 



(Chub.) 



Abundant in the outlet of Gull Lake. 



4. Abramis chrysoleucas (Mitchill). 



One specimen taken in the outlet of Gull Lake. Length, 1.86 

 inches; anal rays, 13. 



5. Notropis muskoka, sp. nov. 



Length of type 2.91 inches. No. 2964. 



Head, 4; depth, 5}^; D., 8; A., 8; scales, 36 (10 from dorsal to 

 ventral fin); teeth, 4-4, tips slightly hooked, grinding surface 

 narrow; eye, 3^ in the length of the head; snout, 3^. Body 

 rather terete and slender; snout bluntish; mouth small and 

 slightly oblique; lower jaw the shorter, slightly included; pos- 

 terior end of maxillary scarcely reaching vertical from the front 

 of orbit. Eighteen scales between nape and dorsal fin, the 

 scales in this region being smaller and more crowded than on 

 sides and posterior dorsal region, much resembling Pimephales 

 notatus in this respect. Origin of the first ray of dorsal fin mid- 

 way between the base of the caudal fin and the tip of the snout. 

 Lateral line incomplete, not extending beyond the fourth scale 

 on each side. The longest (anterior) dorsal rays are nearly three 

 times the length of the posterior ones, the tips of the former 

 extending considerably beyond the tips of the latter when the fin 

 is deflexed; longest dorsal ray, 1^3 in head; pectorals, i^ in 

 head, their tips reaching 2 /$ distance from their base to base of 

 ventrals; ventrals 2 in head, their tips reaching to base of anal. 



Color olivaceous, darker above, very pale below; a dark band 

 about y?, 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 color 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. 



Twenty-four specimens varying in length from 1.31 inches to 

 2.83 inches, taken from the lower part of Gull Lake, and from 

 the outlet just below the first falls. The lateral line on most of 

 the specimens is as described in the type specimen. In a few of 

 the other specimens it is absent on the first scales and appears 

 at intervals along the sides on about 12 scales, occasionally, 

 usually in the smaller specimens, it is absent altogether. It is 

 less developed in this species than in any other of the genus. 



