AULO'PORA (Ooldfuss), a genus of Fossil Polypiaria, from the Silurian Strata.
AURANTIA'CF,iE, Citron Worts, or the Orange Tribe, are Dicoty ledonous Polypetalous plants, with dark-green jointed leaves, filled The Little Auk braves the inclemency of very high latitudes, and congregates in groat flocks far within the Arctic Circle. The inhospit able coasts of Ureenland and Spitzbergen are the dwelling-places of these birds, and thousands have been seen at Melville Island. In those dreary regions they are said to watch the motion of the ice, and when it is broken up by storms down they come in legions, crowding into every fissure to banquet on the crustaceans and other marine animals which there lie at their mercy. It can hardly be called an occasional visitant to this country, for those which have appeared here have been evidently exhausted birds, buffeted by storms and driven by contrary winds far from the spot congenial to their habits. The Little Ank is between 9 and 10 inches in length ; the bill is black, and the legs inclining to brown ; the plumage is black and white, and in winter the front of the neck, which is black in summer, becomes whitish : the change takes place in the autumn.
The bird lays only one egg of a pale bluish-green, on the most inaccessible ledges of the precipices which overhang the ocean.
The Perroquet Ank (Phaleris psittacula, Temminck, Alm psittacula, Pallas), may be taken as an illustration.
Kamtehatka and other northern regions shelter these birds in abundance. They swim and dive admirably. Stories are told to prove their unsuspiciona character; and it les maid that the natives phi*, a dress with large. sleeves near their holes and burrows, into 1, A flower with its calyx, corolla, stamens, and style; 2, a portion of the stamens ; 3, an ovary cut through transversely; 4, a fruit cut through in the same dit calm.
with fragrant essential oil collected in little transparent dots, and n Iluperior ovary changing to a suet:ticut berry, the rind of which it also filled with fragrant essential oil. No natural order can well be
more strictly defined than the Orange Tribe, and none hare properties more uniform and definite. It consists of trees or shrubs found exclusively in the temperate or tropical parts of the Old World, and unknown in a wild state in America. Their flowers are usually odori ferous, and their fruits subacid ; the rind has some shade of yellow. They principally differ from each other in the number and proportion or arrangement of their stamens, in the number of cells or seeds in the fruit, and in the texture of the rind of the fruit, which does not always pull off as in the orange, the lemon, the citron, and their congeners, but is frequently a mere skin inclosing the pulp. [Crrnus.] The natural order which is most nearly allied to the Orange Tribe is that called Xantho.rylacem, into which the oranges pass by their climbing genus, Laranga, and which differ principally in having a hard dry fruit which splits into several carpels.
The Orange, Lemon, Lime, Shaddock, Pompelmoose, Forbidden Fruit, and Citron, are the produce of this order. The Wampa, a fruit highly esteemed in China and the Indian Archipelago, is produced by Cookia punctata. The fruit of Glycosmis citrifolia is delicious ; that of Triphasia is very agreeable. The ogle Marmelos is used in medicine : a perfume is prepared from the rind of the fruit, which itself is delicious to the taste, and acts as a laxative medicine. The leaves of Peronia elephantum. have a very agreeable smell. Orange flowers yield a delicious odour, and the oils of Bergamot and Lemon are obtained from the rind of the fruit of species of Citrus.
(Lindley, Vegetable Kingdom.)