new Species of Fish. 299 



I have not been able to find it except in the Connecticut 

 river, and a stream in the southern partof Brookhaven. That 

 it exists, however, in other parts of Long Island is not at all 

 improbable. 



Leuciscus nasutus. 

 Plate XIII. Fig. 3. 



Entire length three and a half inches; greatest depth six 

 tenths of an inch ; depth at the insertion of the caudal fin, 

 three tenths ; length of the head, three fourths ; depth of the 

 head, four tenths. 



Color above, and on the sides, dark blackish brown. All 

 beneath, from the tip of the upper jaw to the caudal fin, 

 nearly white. The dark brown of the sides becomes a little 

 lighter as it descends, still the transition to the white beneath 

 is very abrupt. The dorsal and caudal fins are light brown, 

 lighter than the back ; ventrals and anal nearly transparent ; 

 pectorals a little darker than the ventrals. 



Eyes three tenths of an inch from the extremity of the up- 

 per jaw, three twentieths in diameter ; iris silvery, clouded 

 with dark dots. 



Mouth semicircular, situated beneath the projecting snout, 

 small, toothless ; lips not corrugated, perfectly smooth. 



Head destitute of scales ; those on the body, small. The 

 lateral line commencing at the upper angle of the operculum 

 bends slightly downward, and then runs nearly straight to the 

 caudal fin. When the specimen becomes dry it may be 

 traced passing forward from the angle of the operculum till it 

 almost reaches the eye, then turning abruptly downward at 

 nearly a right angle it descends till it is below the level of the 

 eye ; turning again it passes forward until bending upward 

 and backward it terminates at the anterior side of the nostrils. 



Nostrils situated in an oval depresssion anterior to the up- 

 per part of the eye ; the posterior aperture the larger. 



The dorsal fin arises one inch and nine twentieths from the 

 tip of the head, is seven twentieths in length, eleven twenti- 



36* 



