120 HISTORY OF THE FISHES OF MASSACHUSETTS. 



Cheilonemus pulchellus, Girard. 

 The Beautiful Leuciscus. 



(Plate XXII. Fig. 2.) 



Leuciscus pulchellus, Beautiful Leuciscus, Storeb, Report, p. 91. 



" " Stober, Mem. Amer. Acad., New Series, n. p. 412. 



" " " Synopsis, p. 160. 



" " Roach Dace, Dekay, Report, p. 208. 



" " VAble genlil, Cov. et Val., Hist. Nat. Poiss., xvn. p. 320. 



" " Atres, Proc. Amer. Assoc. Adv. Sc., II. p. 402. 



" " Heck., in Russ. Reise, n. p. 1039. 



Leuciscus Argenteus, Silvery Leuciscus, Storeb, Report, p. 90. 



" " Silvery Dace, Dekay, Report, p. 208. 



Leuciscus Storeri, L'Able de Storer, Ccv. et Val., Hist. Nat. Poiss., XVII. p. 319, pi. 505. 

 Leucosomus argenteus, Heck., in Russ. Reise, II. p. 1043. 

 Cheilonemus pulchellus, Girard, in Lit. 



Color. Above, of a dark brown ; upper portion of sides brassy green ; lower 

 portion of sides and abdomen of a beautiful flesh-color, tinged with golden reflections. 

 Head black above ; gill-covers cupreous, with flesh-colored tints, and edged posteriorly 

 with a brown, membranous prolongation. Color of dorsal fin similar to that of the 

 back, the firmest portion of the rays reddish. The pectorals are of a reddish-brown 

 above, lighter beneath. The ventrals above are the color of the abdomen. 



Descrij)tion. Body elongated, dorsum slightly arched in front of dorsal fin. Scales 

 upon the body large, transparent, rounded at their summit, truncated at their base, 

 exhibiting numerous strice ; at the base of each scale is seen a dark-colored membrane, 

 which, projecting as far as the apex of the preceding scale, gives the appearance of 

 indistinct oblique bands across the fish ; scales smaller upon the back, and smallest upon 

 the throat. The lateral line commences at the superior angle of the operculum, and, 

 curving downwards nine scales, pursues nearly a straight course to the tail. The 

 lateral line is composed of fifty-one scales ; nine are situated above the lateral line 

 in an oblique line from the origin of the dorsal fin, and six below the lateral line. 



The head is naked; its length is less than one fourth the length of the fish. 

 Diameter of eye about one sixth the length of the head ; distance between the eyes 

 equal to one third the length of .the head. Nostrils situated in front of the eyes ; 

 the posterior orifice the larger, the anterior tubular. Jaws without teeth ; the upper 

 jaw projects slightly over the inferior. 



The dorsal fin, which is subquadrangular, arises on the anterior half of the body. The 

 first two rays are simple, the others multifid. The first ray is one fourth the height 

 of the second. 



