of Britain; the varieties of the Penguins, or marine parrots; and the Guillemots. From these birds the visitor's way lies in the direction of the six cases (155-160) in which the sub-families of the gulls are grouped. The contents of the first cases will at once strike him: here are the Petrels, and the associations of shipwreck and disaster with which they have ever been connected. The group includes the stormy petrel, and the albatross. They have an altogether wild and singular appearance. The true gulls of every sea are grouped in the next three cases (157-159): they come from the ice of the polar seas, and from our own shores, including the kittiwake gull, and the European black-backed gull. The last case of the gull family (160) is given to the Terns, which are caught in all parts of the world; and the Skimmers, so called from the dexterity with which they skim the surface of the water, keeping the under mandible immersed, and the upper dry, in search of prey. Next to the gulls are placed the Tropic Birds (161), the name of which indicates their native clime. These birds prey upon fish; some, as the red-tailed tropic bird, darting upon the flying-fish; and others, as the darters, boldly plunging into the tide from overhanging boughs, in search of their favourite prey; here, too, is the common Cormorant. Four more cases remain for examination, and then the visitor will have closed his inspection of the museum specimens of birds. These four cases contain, however, one or two birds, the habits of which are singular. First, there are the Pelicans with their capacious pouches. The rapidity with which these birds swallow small fish has been witnessed by most people at our Zoological Gardens. The visitor should notice next, the European Gannet, of which strange stories of strength and prowess are related. The velocity with which they dive in search of food has been variously estimated. It is said that on the coast of Scotland, fishermen have found them entangled in their nets at the extraordinary depth of a hundred and twenty feet below the surface. Pennant relates a story of a bird, which, on seeing some pilchards lying upon a floating plank, darted down with such strength, that its bill pierced the board. And now the visitor should turn to contemplate the grand and solitary Frigate Bird. This bird appears to have the power of sustaining itself in the air for an indefinite period, and to wander with the utmost confidence on its broad pinions, over hundreds of miles of ocean, now and then dipping to secure its prey. This slim, pale, and solitary wanderer must have a noble appearance, when calmly sailing upon its great expanse of wing, a thousand miles from any resting-place, its food floating in the element below, to be taken at will. Before leaving the last, or most northerly apartment of the eastern zoological gallery, the visitor would do well to notice a few of the pictures which are suspended above the wall cases. Here are portraits