The economy of the Mole has been much controverted among naturalists. It is found throughout the greater part of Europe. We are overrun with it in most parts of England and Wales; but it does not appear to have been found in the northern extremity of Scotland, and there is no record of its having been seen in the Orkney Isles, Zetland, or Ireland. Its most diligent and instructive historian is Henri Le Court, who, flying from the terrors that came in the train of the French Revolution, betook himself to the country, and from being the attendant on a Court, became the biographer of this humble animal. M. Geoffroy St. Hilaire, the celebrated French naturalist, visited Le Court for the purpose of testing his observations, and appears to have been charmed by the facility and ingenuity with which Le Court traced and demonstrated the subterraneous labours of this obscure worker in the dark. We shall first briefly describe the adaptation of its structure to its habits. The bony framework is set in motion by very powerful muscles, those of the chest and neck being most vigorous. The wide hand, which is the great instrument of action, and performs the offices of a pickaxe and shovel, is sharp-edged on its lower margin, and when clothed with the integuments the fingers are hardly distinguishable. The muzzle of the Mole is evidently a delicate organ of touch, as are also the large and broad hands and feet; and the tail has much sensitiveness to give notice to the animal of the approach of any attack from behind. Its taste and smell, especially the latter, are very sensitive. Its sight is almost rudimentary. The little eye is so hidden in the fur that its very existence was for a long time doubted. It appears to be designed for operating only as a warning to the animal on its emerging into the light; indeed, more acute vision would only have been an encumbrance. If the sight be imperfect, the sense of hearing is very acute, and the tympanum very large, though there is no external ear, perhaps because the earth assists considerably in vibration. The fore-feet are inclined sideways, so as to answer the use of hands, to scoop out the earth to form its habitation or pursue its prey, and to fling all the loose soil behind the animal. The breastbone in shape resembles a ploughshare. The skin is so tough as only to be cut by a very sharp knife. The hair is very short and close-set, and softer than the finest silk; colour black; some spotted and cream-coloured. This hair is yielding; had it been strong, as in the rat or mouse, it would doubly have retarded the progress of the creature; first by its resistance, and then acting as a brush, so as to choke up the galleries, by removing the loose earth from the sides and ceilings of the galleries.