is found in London clay.
13 Pecten coarctatus?--Placentia.
------ various?--recent.
14 ------ species unknown.
Two other Pectens also occur.
Ostrea elongata--Deshayes.
15 Terebratula.
16 One cast, genus unknown, perhaps a Cardium.

MOLUSCA--UNIVALVED SHELLS.

Bulla? Plate II., fig. 2.
FIG.17 Natica--small.
18 ------ large species.
Dentalium?
19 Trochus.
20 Turritella.
---------- in gyps.
21 Murex.
22 Buccinum?
23 Mitra.
24 ----- very short.
25 Cypraea.
26 Conus.
27 ----- (Plate II., fig. 3.)
28 Two, unknown, (Also Plate II, fig. 4.)
The above all appear to belong to the newer tertiary formations.

[Fig.17 to 27--These genera are scarcely ever, and some of them not at
all, found in any but tertiary formations.]

A block of coarse red granite forms an island in the centre of the
river near the lake, but is nowhere else visible, although it is very
probably the basis of the surrounding country.

ROCK FORMATION OF THE COAST RANGE OF ST. VINCENT'S GULF.

Primitive Transition Limestone.--Light grey, striped. Altered in
appearance by volcanic action; occurs on the Ranges north of Cape Jervis.

Granite.--Colour, red; found on the west side of Encounter Bay.

Brown Spar.--South point of Cape Jervis.

Sandstone, Old Red.--East coast of St, Vincent's Gulf.

Limestone, Transition.--Colour, blue. East Coast of St. Vincent's Gulf.
Formation near the first inlet. Continuing to the base of the Ranges.

Clay Slate.--Composition of the lower part of the Mount Lofty Range.

Granite.--Fine grained, red; forms the higher parts of the Mount Lofty
Range.

Quartz, with Tourmaline.--Lower parts of the Mount Lofty Range.

Limestone Flustra, and their Corallines, probably tertiary.--From the
mouth of the Sturt, on the coast line, nearly abreast of Mount Lofty.

APPENDIX No. II.

OFFICIAL REPORT TO THE COLONIAL GOVERNMENT.

* * * * *

GOVERNMENT ORDER.

Colonial Secretary's Office, Sydney,
May 10, 1830.

His Excellency the Governor has much satisfaction in publishing the
following report of the proceedings of an expedition undertaken for the
purpose of tracing the course of the river "Morumbidgee," and of
ascertaining whether it communicated with the coast forming the southern
boundary of the colony.

The expedition, which was placed under the direction of Captain Sturt,