high-water, projects for more than a mile in the sea; and from both sides
of this, mudflats, that become dry at low-water, extend for a very
considerable distance. The anchorage off this point must be of necessity
in the stream of tide, which, when it sets against even a moderate
breeze, causes a heavy sea. And as the point affords no shelter whatever
for boats, it will be absolutely necessary to build a breakwater, at
least as far out as three fathoms at low-water."

MORETON ISLAND.

Moreton Island, under the lee of which the Rattlesnake was at anchor, is
19 miles in length, and 4 1/2 in greatest breadth. It consists for the
most part of series of sandhills, one of which, Mount Tempest, is said to
be 910 feet in height; on the north-west portion a large tract of low
ground, mostly swampy, with several lagoons and small streams. The soil
is poor, and the grass usually coarse and sedge-like. All the timber is
small, and consists of the usual Eucalypti, Banksiae, etc. with abundance
of the cypress-pine (Callitris arenaria) a wood much prized for
ornamental work. The appearance along the shores of the Pandanus or
screw-pine, which now attains its southern limits, introduces a kind of
intertropical appearance to the vegetation. Among the other plants are
three, which merit notice from their efficacy in binding down the drift
sand with their long trailing stems, an office performed in Britain by
the bent grass (Arundo arenaria) here represented by another grass,
Ischaemum rottboellioide: the others are a handsome pink-flowered
convolvulus (Ipomoea maritima) one stem of which measured 15 yards in
length, and Hibbertia volubilis, a plant with large yellow blossoms.

PORPOISES AT MORETON BAY.