云机工具箱下载

《 云机工具箱下载》

To distinguish between the numerous races of Wolves which are scattered more or less abundantly over nearly the entire surface of the earth; to determine that such and such variations are the result of original formation, and that such and such others are merely the product of accidental circumstances; in other words, to establish clear and tangible grounds of specific distinction between animals so varied in external appearance, but corresponding so perfectly in every essential particular, while the shades of character by which they differ, although in many cases strikingly marked, are for the most part so unimportant, or so little permanent, as scarcely to be[94] deserving of notice,—is unquestionably one of the most difficult problems, to the solution of which the zoologist has to apply himself.

It can scarcely fail to have been remarked by those who have perused the preceding pages with moderate attention that the species of cats described in them, including the largest and most formidable of the whole genus, are exclusively natives of the Old World, and confined to the hot and burning climates of Southern Asia and of Africa. A second and more numerous class, of which, however, no example exists at present in the Tower Menagerie, and which, consequently, it does not fall within our province to illustrate, occupy the colder and northern regions of both hemispheres. These belong principally to the same subdivision with the Lynx[42] (being, like him, distinguished by the pencils of long hairs which surmount their ears), and to that which comprehends the domestic cat; and are all of diminutive size and trifling power when compared with those monstrous productions of the torrid zone, the Lion, the Tiger, and the Leopard. The reader is not, however, to imagine that the smaller species exist only in the vi