P.S. Since the foregoing was written, Mr. Thwaites has announced the early publication of a new work on Ceylon plants, to be entitled _Enumeratio Plantarum Zeylaniæ: with Descriptions of the new and little known genera and species_, and observations on their habits, uses, &c. In the Identification of the species Mr. Thwaites is to be assisted by Dr. Hooker, F.R.S.; and from their conjoint labours we may at last hope for a production worthy of the subject.] [Footnote 2: Rhizophera Candelaria, Kandelia Rheedei, Bruguiera gymnorhiza.] Retiring from the strand, there are groups of _Sonneratia[1], Avicennia, Heritiera_, and _Pandanus_; the latter with a stem like a dwarf palm, round which the serrated leaves ascend in spiral convolutions till they terminate in a pendulous crown, from which drop the amber clusters of beautiful but uneatable fruit, with a close resemblance in shape and colour to that of the pineapple, from which, and from the peculiar arrangement of the leaves, the plant has acquired its name of the Screw-pine. [Footnote 1: At a meeting of the Entomological Society in 1842, Dr. Templeton sent, for the use of the members, many thin slices of substance to replace cork-wood as a lining for insect cases and drawers. Along with the soft wood he sent the following notice:--"In this country (he writes from Colombo, Ceylon, May 19, 1842), along the marshy banks of the large rivers, grows a very large handsome tree, named _Sonneratia acida_, by the younger Linnæus: its roots spread far and wide through the soft moist earth, and at various distances along send up most extraordinary long spindle-shaped excrescences four or five feet above the surface. Of these Sir James Edward Smith remarks 'what these horn-shaped excrescences are which occupy the soil at some distance from the base of the tree from a span to a foot in length and of a corky substance, as described by Rumphins, we can offer no conjecture.' Most curious things (remarks Dr. Templeton) they are; they all spring very narrow from the root, expand as they rise, and then become gradually attenuated, occasionally forking, but never throwing out shoots or leaves, or in any respect resembling the parent root or wood. They are firm and close in their texture, nearly devoid of fibrous structure, and take a moderate polish when cut with a sharp instrument; but for lining insect boxes and making setting-boards they have no equal in the world. The finest pin passes in with delightful ease and smoothness, and is held firmly and tightly so that there is no risk of the insects becoming disengaged. With a fine saw I form them into little boards and then smooth them with a sharp case knife, but the London veneering-mills would turn them out fit for immediate use, without any necessity for more than a touch of fine glass-paper. Some of my pigmy boards are two feet long by three and a half inches wide, which is more than sufficient for our purpose, and to me they have proved a vast acquisition.