A FLYING-FROG.

"Whether he is a relative or not of that fish, I am unable to say," was the reply, "but that he exists there is no doubt. He comes down from the top of a high tree to the ground in a slanting direction, just as you have seen a flying-squirrel go from one tree to another. His toes are very long, and webbed to their extremities. The body of the frog is about four inches long, and when spread out the webs of his feet have a square surface of at least twelve inches. This is much more than he needs for swimming, and we must, therefore, conclude that Nature has thus equipped him so that he can fly through the air.

"There are many varieties of butterflies in Sumatra, and some of them are very beautiful. All the tropical islands abound in butterflies, that arouse the enthusiasm of the naturalist by the brilliancy of their colors and the great size they attain. There are numerous birds, especially of the parrot family, and sometimes you will see hundreds of them in a walk of an hour or more through the forests where they live. The parrot is inclined to be sociable, and likes his fellow-parrots; you will rarely see one of these birds quite alone, and when you do, you may conclude that the occurrence is an accidental one.

"Among the habits of birds there is none more singular than that of the Sumatran hornbill."

"What is that?" Frank inquired.

"The hornbill, whose scientific name is Buceros bicornis, makes its nest in a hole in a tree. When the female has laid an egg, the male plasters up the entrance of the hole with mud, and keeps his mate there until the young bird has been reared to the proper age for coming out in the world."

"How does she manage to live all that time?" said one of the boys.