The next ensuing official reference of particular interest is contained in the narrative of the voyage of H.M.S. RATTLESNAKE, by John Macgillivray, F.R.G.S., naturalist of the expedition. The date is 26th May 1848, and an extract reads--"During the forenoon the ship was moved over to an anchorage under the lee (north-west side) of Dunk Island, where we remained for ten days. The summit of a very small rocky island, near the anchorage, named, by Captain Owen Stanley, Mound Islet (Purtaboi), formed the first station. Dunk Island, eight or nine miles in circumference, is well wooded; it has two conspicuous peaks, one of which (the north-west one) is 857 feet in height. Our excursions were confined to the vicinity of the watering-place and the bay in which it is situated. The shores are rocky on one side and sandy on the other, where a low point runs out to the westward. At their junction, and under the sloping hill with large patches of bush, a small stream of fresh water, running out over the beach, furnished a supply for the ship, although the boats could approach the place closely only at high-water. Among the most interesting objects of natural history are two birds, one a new and handsome fly-catcher (MONARCHA LEUCOTIS), the other a swallow, which Mr Goold informs me is also an Indian species. Great numbers of butterflies frequent the neighbourhood of the watering-place; one of these (PAPILIO URVILLIANUS) is of great size, and splendour, with dark purple wings, broadly margined with ultramarine, but from its habit of flying high among the trees I did not succeed in catching one. An enormous spider, beautifully variegated with black and gold, is plentiful in the woods, watching for its prey in the centre of a large net stretched horizontally between the trees. The seine was frequently hauled upon the beach with great success. One evening through its means, in addition to plenty of fish, no less than five kinds of star-fishes and twelve of crustacea, several of which are quite new, were brought ashore. Among the plants of the island the most important is a wild species of plantain or banana, afterwards found to range along the north-east coast and its islands, as far as Cape York. Here I saw for the first time a species of Sciadophyllum (BRASSAIA ACTINOPHYLLA, the umbrella-tree) one of the most singular trees of the eastern coast-line of tropical Australia; a slender stem, about thirty feet in height, gives off a few branches with immense digitate dark and glossy leaves, and long spike-like racemes of small scarlet flowers, a great resort for insects and insect-feeding birds. Soon after the ship had come to an anchor, some of the natives came off in their canoes and paid us a visit, bringing with them a quantity of shell-fish (SANGUINOLARIA RUGOSA), which they eagerly exchanged for biscuit. For a few days afterwards we occasionally met them on the beach, but at length they disappeared altogether, in consequence of having been