232. In South Wales, and in the rivers of the north of England which fall into the sea, a kind of salmon, called _SEWEN_ (_Salmo esiox_), is frequently found. It is known by having nearly an even tail, and being marked with ash-coloured spots. These salmon are chiefly caught from July to September, and seldom weigh more than ten or twelve pounds. They are much inferior to the common salmon in delicacy of flavour. 233. _SALMON TROUT, SEA TROUT, or BUDGE_ (Salmo trutta), _is a species of salmon chiefly characterized by the tail being hollowed, by having seven rays to the anal fin, black spots encircled with ash-colour on the head, back, and sides; and the jaws of equal length._ _It inhabits the sea, and rivers adjacent to the sea; and sometimes weighs eight or ten pounds, or more._ The flesh of the salmon trout is red and good, but not so highly flavoured as that of the salmon; and it varies much, according to the quality of the water in which the fish are taken. Salmon trout are caught chiefly with nets; and the fishing for them generally commences about the beginning of May, and continues till after Michaelmas. In some of the northern countries of Europe, where these fish are very numerous, they are cured by _salting_, _pickling_, and _smoking_; and in these different states they are articles of some commercial importance. The smoking of these and other fish is performed in a tub without bottom, which is pierced at the top and round the sides with holes. This tub is raised on three stones; and the fish being suspended within it, they are exposed, for three days, to the smoke of burning oak-branches and juniper berries, which are lighted beneath. 234. _The FRESH-WATER TROUT_ (Salmo trutta) _is a species of salmon which has its tail somewhat hollowed, eleven rays to the anal fin, the upper parts of the body and the sides marked with red spots encircled with brown, and the lower jaw somewhat longer than the upper._ _These fish inhabit fresh-water rivers, streams, and lakes, but particularly those of mountainous countries; and their weight is seldom more than four or five pounds._