THIS brilliant little fish is the smallest of the _salmonidæ_, and is only found in rivers frequented by salmon; for whenever a river becomes deserted by them, the samlet also disappears. This fish is considered to be the fry of the true salmon, and Mr. Young, in a recent essay, has, we think, fairly established the fact; but Mr. Yarrell and other naturalists assert it to be a distinct species. [Illustration: THE SALMON, (_Salmo salar_,)] IS the boast of large rivers, and one of the noblest inhabitants of the sea, if we esteem it by its bulk, colour, and the sweetness of its flesh. Salmon are found of a great weight, and sometimes measure five feet in length. The colour is beautiful, a dark blue dotted with black spots on the back, merging to silvery white on the sides, and white with a little shade of pink below. The fins are comparatively small. These fish, though they live principally in the sea, come up the rivers at the spawning season, to a considerable distance inland, where the female deposits her eggs. Soon after, both she and the male take an excursion to the vast regions of the sea, and do not visit any of the land streams again till the next year, when they return for the same purpose. They are so powerfully impelled by this natural impulse, that, if they are stopped when swimming up a river by a fall of water, they spring up with such a force through the descending torrent, that they stem it till they reach the higher bed of the stream; and on this account small cascades on the Tweed and other rivers are often called Salmon-leaps. The Salmon is in a great measure confined to the northern seas, being unknown in the Mediterranean, and in the waters of other warm climates. The flesh is red when raw, rather paler when salted or boiled; it is an agreeable food, fat, tender, and sweet, and excels in richness all other fresh-water fish; however, it does not agree with every stomach, and is often injurious when eaten by sick persons.