wounded--in short, do everything in their power to tempt their enemy from the locality. The early life of the young birds differs in no important particular from that of their congeners already described. ROSS'S ROSY GULL. Ross's ROSY GULL (_Rhodostethia rosea_ or _Rossii_), the most beautiful Gull with which we are acquainted, is a resident in America, where it inhabits the far north. Upon some occasions, however, it has been known to visit Europe, and consequently deserves notice, although we are ignorant of any important particulars in which it differs from others of its race. This species is distinguishable by its wedge-shaped tail, the two middle feathers of which project nearly an inch beyond the rest; from this circumstance it is regarded as the representative of a distinct section of the family. Its beak is feeble, and the angular enlargement of the front of the under jaw, so characteristic of the Gulls, scarcely perceptible. The tarsus is moderately strong, and the four-toed foot of a medium length. The coloration of the feathers is more delicate and beautiful than that of any other of the race; the mantle is pearly or silvery grey; the under neck, breast, and belly are pale rose-red; the middle of the neck is adorned with a narrow black band, somewhat resembling a necklace of jet. The exterior web of the first quill is black, that of all the others white. The eyelids and throat are reddish yellow, the beak black, the foot scarlet. The length of this bird is fourteen inches; the length of the wing ten inches and a half; and of the tail five inches and a half. The Rosy Gull is included among British birds, a specimen having been killed upon a ploughed field in Yorkshire in 1847. Yarrell tells us that its flight resembles that of its congeners, and that it did not appear at all shy. * * * * * The PETRELS, or STORM-BIRDS (_Procellaridæ_), are distinguishable among all other sea-birds, and, indeed, among all birds whatever, by the circumstance that their nostrils are represented by horny tubes, situated upon the upper beak. * * * * *