Elongated; depth one-fifth of the length: back and upper part of the sides pale drab: fins yellowish white.

C. Lancastriensis, Shaw, Gen. Zool. vol. v. p. 234. Leuciscus Lancastriensis, Yarr. in Linn. Trans, vol. xvii. p. 7. pl. 2. f. 1. Graining, Penn. Brit. Zool. vol. iii. p. 367. Id. (Edit. 1812). vol. in. p. 484. Yarr. Brit. Fish. vol. i. p. 355.

Length

From seven to nine inches.

Description

{Form). " Length of the head, compared with the whole length of the head, hody, and tail, as one to six: depth of the hody, compared with the whole length, as one to five: nose more rounded than in the Dace; the upper line of the head straighter: eye rather larger: the inferior edge of the preopercle less angular: the dorsal line less convex: dorsal fin commencing exactly half-way between the point of the nose and the end of the fleshy portion of the tail; the first ray short; the second longest: pectorals longer in proportion than in the Dace: vent-rals placed, on a vertical line, hut little in advance of the first ray of the dorsal fin: anal commencing, on a vertical line, under the termination of the dorsal fin-rays when that fin is depressed; the first ray short; the second longest; the last double: the fleshy portion of the tail long and slender; the caudal rays also long and deeply forked: all the fins a little longer than those of the Dace: scales of a moderate size, rather larger than those of the Dace, the diameter across the line of the tube greater, and the radiating lines less numerous; the number in the series forming the lateral line forty-eight; those in an oblique line up to the base of the dorsal fin eight, and downwards to the origin of the ventral fins four: lateral line descending from the upper edge of the opercle by a gentle curve to the middle of the body, and thence to the centre of the tail in a straight line: number of fin-rays,

D.9; A. 11; C. 19; P. 17; V. 10.

(Colours). Top of the head, back, and upper part of the sides, of a pale drab-colour, tinged with bluish red, separated from the lighter coloured inferior parts by a well-defined boundary line: irides yellowish white: cheeks and gill-covers shining silvery white, tinged with yellow: all the fins pale yellowish white." Yarr.

Originally observed by Pennant in the Mersey near Warrington. Mr. Yarrell has since obtained it from the same locality, and pointed out its claims to rank as a distinct species. According to this last gentleman, it is met with in considerable abundance in several streams connected with the above river; but is not known to exist in ponds. In its habits and food it is said to resemble the Trout. Weight not commonly exceeding half a pound.

** Dorsal above the space intervening between the ventrals and anal.