[AS.] A roundish or oval-shaped body laid by birds and other animals, and from which their young come forth. The egg of the bird consists of a yolk with a germ-cell, which is surrounded by white albumen and enclosed in a shell. The germ-cell occupies little space, but it is of great importance, since from it the bird develops. Twisted cords of albumen allow the yolk to roll over when the egg is turned, but the germ-cell always keeps uppermost, and so is always nearest the body of the bird as she sits on her eggs, and thus receives the most heat. In growth the albumen furnishes the matter for the body of the young bird, and the yolk affords its nourishment. The bigger the yolk the larger will be the young chicken. There is at the top of the egg a little bubble of air for the use of the young bird, and fresh supplies of air pass through numerous small pores in the shell. The young bird, when sufficiently grown, chips the shell by a little knob on its beak ; which disappears after it has come forth from the shell. An ostrich egg will weigh three pounds, and contain as much as one dozen hens' eggs. Ostrich eggs are left in the sun to hatch. Alligators place theirs under a mass of vegetable matter heaped up on purpose to produce the heat necessary for hatching. Turtles lay from 100 to 200 eggs, and cover them with sand, carefully smoothing the place where they are left to hatch iu the heat of the sun. The female shark lays but two eggs, which are enclosed in leathery purse-shaped cases, with the four corners lengthened into tendrils, and these becoming entangled in sea-weed hold the egg in its place. The empty black cases of sharks' eggs are often found on the sea-shore. The eggs of fishes are tiny, covered with a thin skin, and so transparent that the fish can be seen moving inside for a day or two before being hatched. A single cod-roe will contain 9,000,000 eggs, but great myriads of fish are devoured when young by their larger neighbors. The eggs of frogs are scattered through a lump of thick jelly, which sticks to grass or twigs, and so is prevented from drifting away by that which affords food to the young animals. Many snakes lay eggs, which like those of the frog are stuck together by a thin jelly. Snails deposit tiny white eggs, which contain perfect little snail-shells within. The eggs of ants are scarcely visible. The queen ant lays all the eggs, which are immediately taken in charge by nurses that lick and clean them till little white grubs are hatched.. The queen bee lays all the eggs of bees, sometimes 2,000 in a single day, and each egg is placed in its own special cell-worker eggs in worker-cells, and drone eggs in drone cells. After a few days the eggs hatch white grubs, which are attended by nurses. Nearly all spiders enclose their eggs in a silken cocoon, which, in some species, the mother carries on her back: 2,000 young spiders have been found in one cocoon. The eggs of domestic fowls are very nutritious.