In the Herbarium formed during the late voyages, are specimens of thirteen species of intertropical Grevillea, in various stages of perfection; of these seven are described from specimens formerly gathered upon the East Coast, and in the Gulf of Carpentaria; the remaining six are, however, perfectly new, and will chiefly augment the last section of that genus, having hard (in some instances spherical) woody follicles, containing seeds orbicularly surrounded by a membranous wing, more or less dilated, and a deciduous style; characters that future botanists may deem sufficient to justify its separation from Grevillea. The range of this division, which has been named by Mr. Brown, Cycloptera, has been hitherto limited to the Gulf of Carpentaria, and the tropical shores of the East Coast. Of the genus Hakea, hitherto almost wholly excluded from the tropical parts of Australia, besides H. arborescens, the only species formerly observed within that circle, the Herbarium furnishes at least two plants, that have been recently discovered in about 22 degrees south latitude, the one being H. oleifolia of King George's Sound, whilst the other proves an entirely new species, belonging to the first section of the genus, having long filiform leaves, and ecalcarated capsules. Upon the East Coast in latitude 14 degrees two shrubs were observed having all the habits of Hakea, of the South-west Coast, but being without fructification, their identity could not be satisfactorily determined. Viewing the general distribution of Banksiae, it is a singular fact in the geographical history of this genus, that its species, which have been traced through almost every meridian of the South Coast, upon the islands in Bass Strait, in Van Diemen's Land, and widely scattered throughout the whole extent of New South Wales to the North Coast, at which extreme of the continent, B. dentata has been observed as far west as longitude 130 degrees East, should be wholly wanting on the line of North-west Coast. Why the links of this almost perfect chain should have been broken on the seashores appears unaccountable, since they are, by reason of their general sterility and exposure, extremely favourable to the growth of the greater portion of the order. Our limited knowledge of the West Coast (properly so called) does not afford us materials to hazard even a partial conclusion, relative to the existence of this family on its shores, excepting from the total absence of any one plant of Proteaceae at those parts of Rottnest and Dirk Hartog's Islands visited during the Bathurst's voyage; an inference may be drawn of the general paucity of any part of the order on the shores of the neighbouring main. Although no species have been found common to shores opposite to each other, in the higher latitudes, the identity of Grevillea mimosoides, Persoonia falcata, and Hakea arborescens, has been established upon the East Coast,