Genus Thalassidroma. (Vigors.)
In these little birds, the smallest of web-footed fowl, the beak is short, much compressed in front of the nasal tube; the tip of the upper mandible suddenly curving downwards, that of the lower angled and following the curve of the upper. The nostrils contained in one tube, but shewing two orifices. The tarsi long and slender; fore-toes webbed : hind-toe merely a small, dependent nail; the wings long and pointed; the tail square or slightly forked.
Several species seem to have been formerly confounded under the name of the Stormy Petrel, which are now found to be distinct: we select for illustration that known as Wilson's Petrel (Thalassidroma Wilsoni, Bonap.), the most commonly seen in the Atlantic. It is about as large as a Lark; of a sooty black hue, with a broad band of rusty brown across each wing, and one of pure white across the rump; the legs are long, and, with the toes and their membranes, are black, with the centre of the latter pale.
The habits of this species are well described by the admirable ornithologist to whose memory it is dedicated. "In the month of July, on a voyage from New Orleans to New York... on entering the Gulf Stream, and passing along the coasts of Florida and the Carolinas, these birds made their appearance in great numbers, and in all weathers, contributing much, by their sprightly evolutions of wing, to enliven the scene, and affording me every day several hours of amusement. It is indeed an interesting sight to observe these little birds in
