The _Delphinapterus beluga_ of La Cepède, _Delphinus Leucas_ of Linnæus, _Beluga_ of Pennant, or white whale of the fishers, is the last of the cetacea to which we shall refer. It is not unlike the narwal in its general form, but is thicker about the middle of its body in proportion to its length. Both jaws are furnished with teeth. It has no dorsal fin. The skin is smooth, the colour white. A male animal of this kind was taken in the Frith of Forth in June, 1815. The length was thirteen feet four inches, and the greatest circumference nine feet. The beluga is generally met with in families or herds of five or ten together. They are plentiful in Hudson’s Bay, Davis’s Strait, and on some parts of the northern coasts of Europe and Asia, where they frequent some of the larger rivers. They are taken for the sake of the oil they produce by harpoons or strong nets; in the latter case, the nets are extended across the stream, so as to prevent their escape out of the river, and when thus interrupted in their course to seaward, they are attacked with lances, and great numbers are sometimes killed. It is now our purpose to give an account of the _quadrupeds_ which inhabit Spitzbergen and the icy seas adjacent. The connecting link between the mammalia of the land and the water is _Trichecus rosmarus_, walrus, morse, or sea-horse of the whale-fishers. It corresponds in several of its characters both with the bullock and the whale. It grows to the bulk of an ox. Its canine teeth, two in number, are of the length externally of ten to twenty inches, (some naturalists say three feet,) and extend downward from the upper jaw, and include the point of the lower jaw between them. They are incurvated inward. Their full length when cut out of the skull is commonly fifteen to twenty inches, sometimes almost thirty, and their weight five to ten pounds each or upward. The walrus being a slow clumsy animal on land, its tusk seems necessary for its defence against the bear, and also for enabling it to raise its unwieldy body upon the ice when its access to the shore is prevented. The walrus is found on the shores of Spitzbergen twelve to fifteen feet in length, and eight to ten feet in circumference. The head is short, small, and flattened in front. The flattened part of the face is set with strong bristles. The nostrils are on the upper part of the snout, through which it blows like a whale. The fore paws, which are a kind of webbed hand, are two-sevenths of the full length of the animal from the snout. They are from two to two and a half feet in length, and being expansive maybe stretched to the breadth of fifteen to eighteen inches. The hind feet, which form a sort of tail fin, extend straight backward. They are not united, but detached from each other. The length of each is about two to two and a half feet; the breadth, when fully extended, two and a half or three feet; the termination of each toe is marked by a small tail.