That it is gregarious no naturalist any longer doubts, being generally seen in large troops at a great distance from the habitations of man. The egg is about three pounds in weight, and in the warmer countries of the East is usually hatched by the rays of the sun alone; though in less heated regions the bird is observed to practise incubation. The same remarks might be applied to the pelican, whose solitary life as an inhabitant of the desert is occasionally referred to in the Sacred Writings. It appears, however, that this bird is migratory, whence we may conclude that it is also gregarious, and does not always remain alone. In their motion through the air, the pelicans imitate the procedure of the wild-goose, and form their van into an acute angle. When of full age, the male is superior in size to the swan, weighs twenty-five pounds, and from wing to wing extends not less than fifteen feet. The upper mandible is flat and broad, and hooked at the end; the lower mandible has appended to it a very dilatable bag, reaching eight or nine inches down the neck, and large enough to contain several quarts of water. Its food is fish; in diving for which it sometimes descends from a great height. When it has filled its pouch, it flies to some convenient point of a rock, where it swallows its prey at leisure. The vulgar notion that the female pelican feeds her young with blood from her breast, has arisen from the use of the bag just described, which she opens from time to time to discharge a supply of fish or water for their nourishment. SECTION V.--AMPHIBIA AND REPTILES.