The tongue is 10 twelfths long, slender, tapering to a point, grooved above, sagittate and papillate at the base. The roof of the mouth with a single row of papillæ, posteriorly divided into two series. Œsophagus 3 inches and 8 twelfths long, its diameter 2 twelfths, and nearly uniform. Proventriculus 1/2 inch long, 3-1/2 twelfths in diameter. Stomach elliptical, 8-1/2 twelfths long, 6-1/2 twelfths in breadth; its lateral muscles strong, the tendinous spaces oblong; the cuticular lining with large longitudinal rugæ, and of a deep red colour. The contents of the stomach in this individual were remains of marine insects, and quartz sand. Intestine 10 inches long, its diameter varying from 1-1/2 twelfth to 1 twelfth; it enlarges near the rectum to 2 twelfths. Rectum 1 inch and 1 twelfth; cœca 1 inch and 1 twelfth, their diameter 3/4 of a twelfth. The trachea is 2 inches and 8 twelfths long, its diameter from 2 twelfths to 1 twelfth; its rings 105, feeble and unossified. The lateral muscles extremely feeble; sterno-tracheals moderate; a single pair of inferior laryngeal muscles. AMERICAN WHITE PELICAN. _PELECANUS AMERICANUS._ PLATE CCCXI. ADULT MALE. I feel great pleasure, good Reader, in assuring you, that our White Pelican, which has hitherto been considered the same as that found in Europe, is quite different. In consequence of this discovery, I have honoured 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 from the misty ages of unknown antiquity. In Dr RICHARDSON’s Introduction to the second volume of the Fauna Boreali-Americana, we are informed, that the _Pelecanus Onocrotalus_ (which is the bird now named _P. Americanus_) flies in dense flocks all the summer in the fur countries. At page 472, the same intrepid traveller says, that “Pelicans are numerous in the interior of the fur countries up to the sixty-first parallel; but they seldom come within two hundred miles of Hudson’s Bay. They deposit their eggs usually on rocky islands, on the brink of cascades, where they can scarcely be approached; but they are otherwise by no means shy birds.” My learned friend also speaks of the “long thin bony process seen on the upper mandible of the bill of this species;” and although neither he nor Mr SWAINSON pointed out the actual differences otherwise existing between this and the European species, he states that no such appearance has been described as occurring on the bills of the White Pelicans of the old Continent.