But still more remarkable is the zoölogical contrast of such close-neighborhood countries as Africa and Madagascar, or Central America and the West Indian archipelago. The Madagascar virgin woods harbor no lions, leopards, hyenas, or baboons, but boast not less than thirty-five species of mammals unknown to the African continent, and twenty-six found nowhere else in the world. Of a dozen different kinds of deer, abundant in North America as well as in Asia and Europe, not a single species has found its way to the West Indies. The fine mountain meadows of Hayti have originated no antelopes, no wild sheep or wild goats. In the Cuban sierras, towering to a height of 8,300 feet, there are no hill foxes. There are caverns--subterranean labyrinths with countless ramifications, some of them--but no cave bears or badgers, no marmots or weasels even, nor one of the numerous weasel-like creatures clambering about the rock clefts of Mexico. The magnificent coast forests of the Antilles produce wild-growing nuts enough to freight a thousand schooners every year, but--almost incredible to say--the explorers of sixteen generations have failed to discover a single species of squirrels. The Old-World tribes of our tree-climbing relatives are so totally different from those of the American tropics that Humboldt's traveling companion, Bonplant, renounced the theory of a unitary center of creation (or evolution), and maintained that South America must have made a separate though unsuccessful attempt to rise from lemurs to manlike apes and men. Of such as they are, Brazil alone has forty-eight species of monkeys, and Venezuela at least thirty. How shall we account for the fact that not one of the large West Indian islands betrays a vestige of an effort in the same direction? More monkey-inviting forests than those of southern Hayti can not be found in the tropics, but not even a marmoset or squirrel-monkey accepted the invitation. In an infinite series of centuries not one pair of quadrumana availed itself of the chance to cross a sea gap, though at several points the mainland approaches western Cuba within less than two hundred miles--about half the distance that separates southern Asia from Borneo, where fourhanders of all sizes and colors compete for the products of the wilderness, and, according to Sir Philip Maitland, the "native women avoid the coast jungles for fear of meeting Mr. Darwin's grandfather."