The following luminous description of this game and excellent fish is borrowed from Dr. Richardson’s _Taura-boreali-Americana_, or natural history of the Northern Regions of America, including parts of the United States, and the British Provinces as far north as to the Arctic Ocean. The specimen from which it was compiled was caught at Penetanguishine, on the great Georgian bay of Lake Huron, but will answer for fish of this genus taken in any part of America which they may chance to frequent; so small is their variation in any respect but that of color, which appears to vary in obedience to no fixed law of locality or latitude, except that it appears to me that of the fishes taken in estuaries and at the mouths of tidal rivers, the color is deeper and the tints fade from cerulean black along the dorsal outline to olive green on the flanks, with a silver belly; while in clear lakes and fresh streams, they change from olive-green on the back to bright golden yellow on the sides and belly. THE YELLOW PERCH. _Color._—General tint of the back greenish-yellow; of the sides golden-yellow with minute black specks; and of the belly whitish. Nine or ten dark bands descend from the back to the sides, and taper away toward the belly; the alternate ones are shorter, and on the tail and shoulders they are less distinctly defined: the longest band is opposite to the posterior part of the first dorsal fin, on which there is a large black mark. _Form._—The body is moderately compressed, its greatest thickness being somewhat more than one half of its depth. Its profile is oblong, tapering more toward the tail, which is nearly cylindrical: its greatest depth is at the ventrals, and rather exceeds one-fourth of the total length, caudal included. The head constitutes two-sevenths of the total length, and its height, at the eye, is equal to one-half its length from the tip of the snout to the point of the gill-cover. The forehead is flat, but appears depressed, owing to the convexity of the nape. The snout is a little convex. The orbits are lateral, distant more than one of their own diameters from the tip of the snout, and more than two diameters from the point of the gill-cover. The jaws are equal. The mouth descends on it runs backward, its posterior angle being under the centre of the orbit. _Teeth._—The intermaxillaries, lower-jaw, knob of the vomer, and edge of the palate-bones, are covered with very small, straight or slightly-curved, densely-crowded teeth (_en velours._) The vault of the palate, posterior part of the vomer, and the pointed tongue, are smooth.