Of the Australian portion of Mimoseae, which (having been met with upon all the coasts of the continent, and equally diffused in the interior) forms a leading characteristic of its vegetation, upwards of fifty species have been collected, in various stages of fructification; nearly the whole of which are unpublished plants. Several of those discovered on the north-western shores, and islands off the West Coast, being also extremely curious in their general form and habits; and the existence of a few appears limited to a solitary particular situation, and no one species was observed common to those parts, and the opposite or eastern shores of the continent. The Papilionaceous division exceeds seventy species, two-thirds of which belong to established diadelphous genera, found chiefly within the tropic, where some, peculiar to Terra Australis, and heretofore limited to the more temperate regions, have been discovered. Thus Hovea and Bossiaea were detected in New South Wales, in latitude 20 and 22 degrees South, as well as on the North Coast; the latter genus being likewise found on the north-western shores, where also two species of Kennedia exist; and Templetonia, a genus nearly related to Bossiaea, originally discovered on the southern shores of Australia, is abundant on an island off the West Coast. Upon the North-west Coast, particularly in the parallels of 14 and 15 degrees South, where an exotic feature (if the usual characteristic of the Flora of other countries might in this case be so termed) is as manifest, and is as strongly blended with the pure Australian character (Eucalyptus and Acacia) in its general vegetation, as on any other parts of those shores; Jacksonia and Gompholobium, genera of Papilionaceae, with distinct stamens, almost limited to the parallel of Port Jackson and the South Coast, were observed: Daviesia, almost wholly restricted to the higher Australian latitudes, has been remarked on the North Coast. Of Lomentaceae, Bauhinia, Caesalpinia, and the emigrant genus Guilandina, are all of intratropical existence in New South Wales, as also upon the North-west Coast; but Cassia, although it has an equal extensive range in the equinoctial parts of New Holland, has also been recently traced as far in the interior, on the parallel of Port Jackson, as the meridian of 146 degrees East. EUPHORBIACEAE. The Herbarium contains thirty-three plants of this very numerous order, whose maximum seems decidedly to exist in India and equinoctial America. The whole of the Australian species are referable to established Linnean genera, of which Croton and Phyllanthus are most remarkable and numerous, existing on all the intratropical shores of Terra Australis, but by no means limited to them, both genera, together with Euphorbia and Jatropha, being found in the parallel of Port Jackson; and Croton exists likewise at the southern extreme of Van Diemen's Land, which is probably the limit of the genus on that hemisphere.