In Lev. xi. 20, the words, "All fowls that creep, going upon all four, shall be an abomination unto you," are evidently intended to apply to the bat, which, as is now well known, is not a bird with wings, but a mammal with very long toes, and a well developed membrane between them. Like other mammals, the Bat crawls, or walks, on all four legs, though the movement is but a clumsy one, and greatly different from the graceful ease with which the creature urges its course through the evening air in search of food. Perhaps the prohibition to eat so unsightly an animal may seem almost needless; but it must be remembered that in several parts of the earth, certain species of Bat are used as food. These are chiefly the large species, that are called Kalongs, and which feed almost entirely on fruit, thus being to their insectivorous relatives what the fruit-loving bear is among the larger carnivora. These edible Bats have other habits not shared by the generality of their kin. Some of the species do not retire to caves and hollow trees for shelter during their hours of sleep, but suspend themselves by their hind legs from the topmost branches of the trees whose fruit affords them nourishment. In this position they have a most singular aspect, looking much as if they themselves were large bunches of fruit hanging from the boughs. Thus, they are cleanly animals, and are as little repulsive as bats can be expected to be. But the ordinary bats, such as are signified by the "night-fliers" of the Scriptures, are, when in a state of nature, exceedingly unpleasant creatures. Almost all animals are infested with parasitic insects, but the Bat absolutely swarms with them, so that it is impossible to handle a Bat recently dead without finding some of them on the hands. Also, the bats are in the habit of resorting to caverns, clefts in the rocks, deserted ruins, and similar dark places, wherein they pass the hours of daylight, and will frequent the same spots for a long series of years. In consequence of this habit, the spots which they select for their resting place become inconceivably noisome, and can scarcely be entered by human beings, so powerful is the odour with which they are imbued.