208 NEW-YORK FAUNA. 
has the various popular names of Red-fin, Red Dace, and Rough-head. It appears-to be 
allied to the L. pulchellus of Storer. 
THE ROACH DACE. 
LEUcIscUS PULCHELLUS. 
Leuciscus pulchellus, The Beautiful Leuciscus. Storer, Massachusetts Report, p. 91. 
Characteristics. Brown above ; lighter on the sides. Dorsal nearly as high again as long. 
Length fourteen inches. 
Description. Back slightly arched ; the arch on the top of the head very slight. Scales 
large, small on the back and smaller on the throat; transparent, rounded at the summit, trun- 
cated at their base, exhibiting numerous strie. At the base of each scale, a fleshy dark 
colored membrane, which, projecting as far as the apex of the preceding scales, gives the 
appearance of indistinct oblique bands across the fish. The lateral line commences at the 
upper angle of the branchial aperture, curves downward nine scales, and goes off straight ; it 
is composed of fifty-nine scales. Nine above the lateral line, in an oblique line from the origin 
of the dorsal fin, and six below. Head naked; distance between the eyes equal to one-third 
the length of the head. Nostrils placed higher than the eyes, and in front. of them ; the posterior 
largest, the anterior tubular. Jaws without teeth. Upper jaw juts slightly over the lower. 
The dorsal fin arises on the anterior half of the body ; the first ray one-fourth the height of 
the second. Pectorals rounded. Ventrals beneath the dorsal, shorter than the pectorals. Anal 
arises 0°'75 behind the dorsal, and is higher than long ; the first ray one-fourth the height of 
the second. Caudal large, three inches wide when expanded. 
Color. Back dark brown; sides and abdomen flesh-colored, with metallic reflections. Head 
bluish above ; gill-covers silvery, with metallic tints and a brown membranous prolongation. 
Dorsal brown with reddish. Pectorals brownish above ; lighter beneath. Ventrals and anal 
light-colored. 
Length, 14:0. 
Fin.rays, D. 103 -Pi17 3 V. 83 A105 C222. 
According to Dr. Storer, this species is found in the Eastern States, where it is called Roach 
and Cousin Trout. 
