The whole region is subject to earthquakes, and numberless volcanoes rise in all directions. In the low ridge which separates the Lake of Nicaragua from the Pacific are several volcanic hills, most of them active; while further to the north-west, in the district of Conchagua-- scarcely more than one hundred and eighty miles in length--there are upwards of twenty volcanoes. The two most lofty are found in the Guatemala range--that of Fuego being upwards of 12,000 feet in height, and that of Agua, 18,000 feet. Many parts of the interior of the country have been but very partially explored, and are, indeed, almost unknown. Of the purely native tribes, most of them have become mingled with Spaniards or negroes. Parts of the coast are inhabited by mixed races of Caribs, who have migrated from Saint Vincent, one of the Leeward islands. These Caribs are known as the Black and Yellow Caribs--the former being the descendants of the survivors of the cargo of an African slaver, wrecked in the neighbourhood of that island. The descendants of the Spaniards are the dominant race, and they have divided the country into various republics, though the greater portion is still in almost as savage a condition as when first discovered. HONDURAS AND THE MOSQUITO COUNTRY. The English have, however, a settlement in Honduras; and there is an Indian state forming the eastern portion of Nicaragua, under the government--if so it can be called--of a native king. His territory is known as the Mosquito Country, from the name of the chief native tribe over which he rules. The climate is very similar to that of the West Indies. On the lower lands a variety of tropical productions can be brought to perfection, while in the high regions cereals of various sorts are abundantly produced. FAUNA.