It is often said that monkeys sometimes cross streams by means of monkey bridges. According to the popular notion, the monkeys take hold of one anothers tails and suspend themselves in a living rope from the limb of a tree on the bank of a river that they wish to cross. They begin to sway back and forth until they gain enough momentum to swing the lower end of the column to a tree on the opposite bank. The other end of the bridge is then released and swung across the stream. Naturalists are inclined to doubt these stories. Dr. William T. Hornaday, the noted zoologist, who for thirty years was director of the New York Zoological Park, expressed the opinion that the living monkey bridge is a myth. Still, he said, one should be very cautious in stating what animals never did and what they cannot do. Monkeys do hang on to I one another from time to time and frequently one will climb up the tail f of another. One monkey will sometimes even draw another up. Dr. William M. Mann, superintendent of the National Zoological Park, thinks the stories of monkeys making bridges by taking hold of one another may have been suggested by the habits of the spider monkeys of South America. At any rate, these natural acrobats of the forest and jungle are the animals that usually figure in the- monkey bridge stories. They are very fond of taking hold of each other and performing all kinds of gymnastics. Their remarkable prehensile tails serve as a “fifth hand.” More than one writer has reported cases of the red howling monkeys of Central and South America spanning tree tops by linking hands and tails and forming a living chain.