American Zoology is very peculiar: a few arctic quadrupeds, birds and insects excepted; all the animals of this hemisphere are peculiar to it. Reptiles almost entirely such, even in the North. All the American monkeys form distinct species. The tropical animals of the two hemispheres are distinct, even often in genera. Out of 33 quadrupeds formerly domesticated in America, the dog only may be deemed a stranger: and it had even many American varieties. The domestic quadrupeds of ancient America were 33, while only 25 in Asia, Africa and Europe. Among them were 4 species of Vicunia, 4 of Agutis, 2 deer, 2 hogs, 10 monkeys, &c. See my dissertation on the domestic animals of both hemispheres, 1832. Americans had also tamed 22 birds or fowls, as many as Asia, &c., and even some reptiles, fishes, insects, &c., had become domestic: altogether 112 in America and only 80 in Europe, Asia, &c., before 1492. American botany offers many peculiar regions; in the North only, akin to Asiatic or European botany; but becoming quite distinct in the tropics, still more so in Austral America. Since 1492 the European colonists have brought many plants, that are become spontaneous from Canada to Chili: these must be carefully separated from the ancient indigenous plants. The American Floras are nearly as many as the 15 natural regions already indicated, each having a focal seat or cradle in some range of mountains. They become richer or more abundant in species within the tropics, decreasing to the North and South. Trees and palm abound there, and disappear near the poles, the palms are unknown beyond the 36 degrees North and South. The equator has 500 species of trees; in latitude 40 N. and S. only 100 kinds are found, or even less. Social plants and grasses abound in plains, and in the North dwindle to mosses and lichens. Trees were early tools of civilization, affording timber, fuel, dies, houses, boats, weapons, &c. Fruit trees afforded food in abundance: even the tribes of North America near latitude 40 d. had 40 kinds of native wild fruits, and had begun to plant orchards of plumtrees, peachtrees, crab-trees, nut-trees. They knew how to make oils of nuts, to dry the fruits, make sugars out of maples and other trees. Fish has always afforded an ample supply of food to early nations, whence the preference to dwell near streams, Lakes and shores. Notwithstanding the swimming rambles of fishes, it is only the pelagic or oceanic tribes of them that are common to both hemispheres. Most of the resident shore fishes of America are peculiar species. Still more so with lacustral and fluviatile fishes. These are divided into peculiar regions. Our northern lakes form one; and almost every large stream has a peculiar generation of finny tribes: such are the Mississippi, Maranon, Parana, the Atlantic streams and rivers, those of Brazil, &c.