fringed with _Casuarinæ_ and other trees, which, although of large size, never arrive at the altitude of the stately _Eucalypti_, which attain, under favourable circumstances, a size and height which appear perfectly incredible. Mr. Backhouse states that one measured by him on the Lopham Road, near Emu Bay in Van Diemen’s Land, which, “was rather hollow at the bottom and broken at the top, was 49 feet round at about 5 feet from the ground; another that was solid, and supposed to be 200 feet high, was 41 feet round; and a third, supposed to be 250 feet high, was 55½ feet round. As this tree spread much at the base, it would be nearly 70 feet in circumference at the surface of the ground. My companions spoke to each other when at the opposite side of this tree from myself, and their voices sounded so distant that I concluded they had inadvertently left me, to see some other object, and immediately called to them. They in answer remarked the distant sound of my voice, and inquired if I were behind the tree! When the road through this forest was forming, a man who had only about two hundred yards to go, from one company of work-people to another, lost himself: he called, and was repeatedly answered; but getting further astray, his voice became more indistinct, till it ceased to be heard, and he perished. The largest trees do not always carry up their width in proportion to their height, but many that are mere spars are 200 feet high.” A prostrate tree noticed by Mr. Backhouse in the forest near the junction of the Emu River with the Loudwater “was 35 feet in circumference at the base, 22 feet at 66 feet up, 19 feet at 110 feet up; there were two large branches at 120 feet; the general head branched off at 150 feet; the elevation of the tree, traceable by the branches on the ground, was 213 feet. We ascended this tree on an inclined plane, formed by one of its limbs, and walked four abreast with ease upon its trunk! In its fall it had overturned another 168 feet high, which had brought up with its roots a ball of earth 20 feet across.” There are other remarkable features, which, as they appertain to districts frequently alluded to in the course of the work, it becomes necessary to notice, namely the immense deltas formed by the descent of the waters of the interior, such as the valley of the Murray near its embouchure into the sea, spoken of as the great Murray scrub of South Australia; this enormous flat of nearly one hundred miles in length by more than twenty in breadth is clothed with a vegetation peculiarly its own, the prevailing trees which form a belt down the centre consisting of dwarf _Eucalypti_, while the margins are fringed with shrub-like trees of various kinds. Nor must the immense belts of _Banksiæ_, which grow on the sand-hills bordering the sea-coast and in some parts of the interior, or the districts clothed with grass-trees (_Xanthorrhæa_), be passed over unnoticed; in the intertropical regions of Australia, of