The most remarkable characteristic of these birds, however, is the large pouch formed by an elastic skin depending from the two sides of the lower mandible and extending nearly the whole length of the bill. This pouch may be greatly distended and will hold a large quantity of either solid or liquid matter. The bills are depressed and strongly hooked. The American White Pelican ranges throughout the whole of North America as far north, in the interior, as the 61° north latitude, and as far to the southward in winter as Central America. Northward from Florida, along the Atlantic coast, it is now rare. In the year 1838 Audubon gave this species the specific name Americanus, in view of his discovery that it differed in essential characteristics from the European form, called Ornacrotalus. The most marked difference that he noticed was the crest upon the upper mandible which he supposed was permanent and not, as we now know, a characteristic of this species only during the breeding season. In writing of the naming of this species he uses the following beautiful language: “In consequence of this discovery, I have honored it with the name of my beloved country, over the mighty streams of which may this splendid bird wander free and unmolested to the most distant times, as it has already done in the misty ages of unknown antiquity.” Much as we desire to honor Audubon, who has given us so much of interest concerning the life histories of the birds, yet we are restrained by the rules of scientific naming, which require under ordinary circumstances, the use of the earliest name. Audubon’s name was antedated by that of Gmelin, a German Naturalist, who in 1788 noticing the peculiar characteristics of the American White Pelican and that it differed from the European form, gave it the name erythrorhynchos, which is now used by ornithologists. This name has its origin in two Greek words, meaning red and bill. [Illustration: ] The peculiar growth or crest on the bill which disappears soon after the breeding season, varies greatly both in size and shape. Dr. Ridgway says: “Frequently it consists of a single piece, nearly as high as long, its vertical outlines almost parallel, and the upper outline quite regularly convex, the largest specimen seen being about three inches high, by as many in length. More frequently, however, it is very irregular in shape, usually less elevated, and not infrequently with ragged anterior, or even posterior continuations.” At this time the bill is also more or less orange-red in color.