The southern shore of Port Phillip is a singular long narrow tongue of land, running out from the foot of the range of which Arthur's Seat is the most conspicuous point. I infer from the limestone prevailing in it, and containing shells of recent species, that it was once much beneath its present level; in fact, that it stops up what was formerly a broad mouth of the bay, leaving only the present narrow entrance at the western extremity. Over its surface are scattered hills from one to two hundred feet in height, in the valleys between which was found some light sandy soil supporting at this time rich grass, and at various places a thin growth of Banksia, Eucalypti, and Casuarina, all stunted and showing symptoms of having been roughly used by the south wind. Near the spot we had chosen for the centre of our observations was a well of inferior water, and we did not find any better in the neighbourhood. The point in question therefore will never be very eligible as a settlement. The kangaroos are numerous and large, and the finest snappers I have ever heard of are caught off this point, weighing sometimes as much as thirty pounds. Our fishing experiments, however, were not very productive, being principally sharks; thirteen young ones were found in a single female of this species. SAIL FOR KING ISLAND. Bad weather prolonged our stay until the 26th of November. We had been chiefly occupied in determining the position of the mouths of the various channels intersecting the banks, that extend across the entire bay, three miles within the entrance. The most available passages appeared to be those lying on the south and west shores, particularly the former for vessels of great draught; but we did not conclude the examination of them at this time, sailing on the morning of the 26th to survey the coast to the westward. The first thirteen miles, trending West by South was of a low sandy character, what seemed to be a fertile country stretching behind it. Two features on this line are worthy of notice--Point Flinders, resembling an island from seaward, on account of the low land in its rear; and the mouth of the river Barwon, navigable for boats entering in very fine weather. On its northern bank, eight miles from the sea is the site of the town of Geelong. Passing this the nature of the country begins to change, and high grassy downs with rare patches of woodland present themselves, which in their turn give place, as we approach Cape Otway, to a steep rocky coast, with densely wooded land rising abruptly over it. CAPE OTWAY.