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 compact build of their bodies. Their beak is about the same length as the head, and compressed laterally—its upper surface slightly curved, its apex acutely pointed, and its cutting edges finely denticulated. The legs are small in proportion to the size of the body, and the hind toe connected with the inner one by but a very narrow web. The wings are long, and the tail composed of twelve or fourteen quills; the central tail-feathers are remarkably prolonged, and present a structure that is quite peculiar, owing to the laxity and sparseness of their barbs. Their general plumage is thick and delicately tinted. "No one who sees the Tropic Birds for the first time," says Pöpping, "would regard them as inhabitants of the sea, but would rather imagine them to be land birds that had strayed by accident far into the illimitable desert of the ocean. In strength of wing they are unrivalled. Without moving their pinions in the slightest degree, or turning the body, they mount quickly to a great altitude, and there seem to repose upon the air, as if it were a solid support. Only when engaged in fishing, or when they perceive a ship, do they exchange this state of luxurious repose for active exertion. On such occasions down they come from the skies with astonishing speed, and never seem tired of circling round the vessel, as though narrowly watching all that may be passing on board. Frequently they soar so high as to be completely invisible except to a practised eye, but they are very rarely seen to swim."

THE WHITE-TAILED TROPIC BIRD.

The (Phaëton æthereus) is strikingly beautiful. Its head, neck, and under parts of the body are pure white, delicately tinged with red; the face is marked about the eyes with a broad stripe of black; the back and mantle are white, marked with a crooked dark line; the wings are black, bordered with white. The eye is brown, beak coral-red, foot dusky yellow. The length of this bird is two feet five inches, of this one foot five inches belongs to the centre tail-feathers; the breadth is three feet four inches. The White-tailed Tropic Birds are commonly met with upon the Atlantic Ocean, and, according to Latham, are found in abundance in the South Sea Islands, but are especially numerous in Palmerston Island, where the trees are frequently loaded with them. Ellis tells us that in the latter island they are so tame as to allow themselves to be taken from the branches with the hand. "These," says Bennett, "are amongst the most beautiful of all the oceanic birds, and excite admiration as the rays of a bright sun shine upon their chaste and delicate satin plumage; they are as gentle in manner as graceful in flight, and it is pleasing to watch their evolutions, for when soaring to a great elevation the action of their wings is slow, accompanied by a jerking motion, rising and falling in the air, at the same time uttering their peculiar, shrill notes. Sometimes they are resting on the surface of the water, and in calm weather occasionally seat themselves on the backs of turtles as they float along in lazy enjoyment."

Sailors formerly believed that the appearance of Tropic Birds indicated the contiguity of land; this idea, however, is erroneous, as they are frequently seen at a great distance from shore. According to Bennett this species has been seen 1,000 miles from the coast. The long tail-feathers of this beautiful bird are in great request.

THE RED-TAILED TROPIC BIRD.

The (Phaëton phœnicurus) has, like the preceding species, white plumage tinged with rose-colour; a broad, black, transverse band, which commences in front of the eyes, is prolonged towards the back of the head into a point; the centre of the secondary quills, and the feathers on the sides are deep black; the shafts of the primary quills are black nearly to the tips. The middle tail-feathers are white towards their base, but elsewhere bright red with black shafts. The eye is blackish brown, beak scarlet, with a pale blue stripe at its base, and the tarsus faint blue; the