THE SACRAMENTO PERCH (_Archoplites interruptus_) The Sacramento perch is closely allied in structure to the rock-bass, and is the only perchlike fish in fresh water west of the Rocky Mountains. It was collected by the Pacific Railroad Survey and described and named _interruptus_ by Girard, in 1854, owing to the interrupted character of the vertical markings. It inhabits the Sacramento and Joaquin rivers in California, and is much esteemed as a food-fish, but unfortunately it is being rapidly exterminated by the carp and catfish that are said to infest its spawning grounds. In its conformation it is almost identical with the rock-bass, but differs in having more teeth on the tongue and more gill-rakers. In coloration, however, it differs very much, being sometimes uniformly blackish or brassy, but usually the black coloration is disposed in several vertical bars or markings of an irregular shape. It has a black spot on the angle of the gill-cover. I have had no experience in angling for the Sacramento perch, which is said to be taken with the hook in large quantities for the market. I have no doubt but the tackle recommended for the rock-bass would be just as effective for this fish, with similar baits. THE WARMOUTH PERCH (_Chænobryttus gulosus_) The warmouth perch, also known as the black sunfish in the North, was first described by the French naturalists, Cuvier and Valenciennes, in 1829, from specimens from Lake Pontchartrain. Louisiana. They named it _gulosus_, "large-mouthed," owing to its big mouth. There is a slight variation between the Northern and Southern forms. It abounds in all coastwise streams from North Carolina to Florida and Texas, and sparingly in Lake Michigan and the upper Mississippi Valley. In its general shape and appearance it is not unlike the rock-bass, though in the radial formula of its fins and in its large mouth it approaches nearer the black-bass than any other species of the family. It has a large head and deep body, almost as deep as long, and is nearly symmetrical in outline. Its teeth are in brushlike bands on the jaws, with patches on the tongue. The Southern form has one or two less soft rays in the dorsal and anal fins. It is dark olive on the back, lighter on the sides, with blotches of blue and coppery red, and the belly brassy or yellowish. Iris red, ear-flap black, bordered with pale red, with three dusky red bars radiating from the eye across the cheeks. Fins mottled with a darker color, and a black blotch on the last rays of the soft portion of the dorsal fin.