SANTALACEAE.  Nearly three-fourths of the Australian portion of the order described, were formerly discovered in the parallel of Port Jackson, upon the shores of the South Coast, and in Van Diemen’s Land.  The genus Choretrum, however, heretofore limited to the southern extremes of the continent, approaches within about two degrees of the tropic on the West Coast, having been lately observed on Dirk Hartog’s Island.  It is rather remarkable that neither Leptomeria nor Choretrum form a part of the feature of the vegetation of the arid, depressed portions of the North-west Coast,* where several of the more harsh, rigid kinds of plants, of various genera, of the South Coast have been remarked.  Those extensive shores (generally speaking) are not wanting in the order, for two species of the tropical genus Santalum, Exocarpus, and a globular-fruited Fusanus, were collected in and about the parallel of 15 degrees South.

(Footnote.  Towards the North-west Cape.)

PROTEACEAE.  Since the publication of Mr. Brown’s valuable dissertation on this very extensive natural family, in which were described all the species known at that period, a few important discoveries have been made in Terra Australis, particularly on the North-west Coast, where the order seems to be limited to Grevillea, Hakea, and Persoonia.

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.