The beaver of this country is large and fat: the flesh is very palatable, and, at our table, was a real luxury. On the 7th of January, our hunter found a beaver in his trap, of which he made a bait for taking others. This bait will entice the beaver to the trap as far as he can smell it; and this may be fairly stated to be at the distance of a mile, as their sense of smelling is very acute. The sea-otter resides only on the sea-coast or in the neighborhood of the salt water. When fully grown, he attains to the size of a large mastiff dog. The ears, which are not an inch in length, are thick, pointed, fleshy, and covered with short hair; the tail is ten inches long, thick at the point of insertion, and partially covered with a deep fur on the upper side; the legs are very short, covered with fur, and the feet with short hair. The body of this animal is long, and of the same thickness throughout. From the extremity of the tail to the nose, they measure five feet. The color is a uniform dark brown, and when in good condition, and in season, perfectly black. This animal is unrivalled for the beauty, richness, and softness of his fur. The inner part of the fur, when opened, is lighter than the surface in its natural position. There are some black and shining hairs intermixed with the fur, which are rather longer, and add much to its beauty. HORSES AND DOGS. The horse is confined chiefly to the nations inhabiting the great plains of the Columbia, extending from latitude forty to fifty north, and occupying the tract of country lying between the Rocky Mountains and a range of mountains which crosses the Columbia River about the great falls. In this region they are very numerous. They appear to be of an excellent race, lofty, well formed, active, and enduring. Many of them appear like fine English coursers. Some of them are pied, with large spots of white irregularly scattered, and intermixed with a dark-brown bay. The greater part, however, are of a uniform color, marked with stars, and white feet. The natives suffer them to run at large in the plains, the grass of which affords them their only winter subsistence; their masters taking no trouble to lay in a winter's store for them. They will, nevertheless, unless much exercised, fatten on the dry grass afforded by the plains during the winter. The plains are rarely moistened by rain, and the grass is consequently short and thin. Whether the horse was originally a native of this country or not, the soil and climate appear to be perfectly well adapted to his nature. Horses are said to be found wild in many parts of this country.