Like the swans, these birds frequently passed over us, coming from, and going to that point to which all the aquatic, as well as many of the ordinary birds winged their way. We sometimes saw them low down, sweeping over the ground in circles, as if they had just risen from the water; but in neither instance could such have been the case. On several occasions we might have shot them, but they were useless, and would have encumbered us much.

141. PODICEPS GULARIS.--Grebe.

The common Diver; frequenting the pools and rivers of the interior: of dark brown plumage and silver-white belly. There are two or three varieties of this bird, that I have seen on other occasions; but none, with the exception of the present specimen, during the recent Expedition.

NO. I. LIST OF SPECIMENS, AND THE NAMES OF THE VARIOUS ROCKS, COLLECTED DURING THE EXPEDITION.

1)
2) Tertiary Fossil, or limestone, (opalescent) from above
3) the fossil cliffs.
4)
5 Ferruginous sandstone.
6 Soapstone, apparently a recent deposit.
7 Gneiss.
8 Hornstone, a variety of.
9 Specular iron ore, lamellar with quartz.
10 Granite, with mammillary hematite--hornstone.
11 Specular iron ore, and iron ore highly magnetic.
12 Granite, white, a variety of.
13 Soapstone or clay, schorl, and slate with mica and chlorite.
14 Gneiss, a variety.
15 Granite, grey, both fine and coarse.
16 Granite, white, fine grained.
17 Hornstone, and mica slate (waved).
18 Clay.
19 Magnesian limestone, and limestone slaty and impure.
20 White conglomerate rock, appearing a binary granite.
21 Indurated clay.
22 Silicious pebbles.
23 Silicious rock, with veins of quartz.
24 Silicious rock.
25 Rock composed principally of silica and alumen forming sandstone.
26 Milky quartz.
27) Rounded balls, composed of sand and clay, cemented by oxide of iron;
28) hollow, but without crystals; rounded by the action of water.
29 Hornstone.
30 Granite, grey, a variety.
31 Ferruginous sandstone.
32 Silicious rock, with veins of quartz.
33 Mica slate.
34 Quartz, indurated with red veins.
35 Silicious rock, dusky.
36 Silicious rock, white.
37 Gypsum, or sulphate of lime.
38 Quartz veins from slate; trap rock, containing hornblende and
feldspar; limestone, recent, with clay and slate imbedded.
39 Impure and slaty limestone; hornslate, a variety.
40 Hemaetite, a silicious oxide of iron; quartz veins in slate; silicious
rock; chalcedony; sandy clay.
41 Indurated and dusky quartz.
42 Quartz, a hard, fine-grained dusky variety.
43 Ditto ditto ditto
44 Silicious rock, appearing a knob, from a slate formation
45 Limestone (fibrous).
46 Silicious rock.
47 Horn slate.
48 Silicious rock; iron-stone pebbles.
49 Hornstone.
50 Quartz.
51 Quartz.
52 Trap rock.
53 Quartz.
54 Hornstone.
55 White rock.
56 White sandstone.
57 Sandstone.
58 Sandstone.
59 Silicious oxide of iron.
60 Gypsum.

It will be seen, by an inspection of the map, that there is a large interval of low depressed country, between Stanley's and Grey's Ranges. The rock formation on the latter being almost exclusively of one kind. Beyond Grey's Range, no elevation in the interior, on the N.W. line traversed by the Expedition, was seen; but on the Stony Desert the fragments of rock, with which it was covered, were composed of indurated quartz, rounded by attrition, and coated with oxide of iron. North of the Stony Desert, sandstone occurred in the bed of Eyre's Creek, and milky quartz cropped out of the ground, in lat. 25 degrees 35 minutes, and in long. 138 degrees 39 minutes. The valley of Cooper's Creek was, however, bounded in by low quartzose hills, covered with sand. The general level of the interior was otherwise ferruginous clay, on which the long sandy doones or ridges rested, excepting where their regularity was broken by flooded plains. The clay rested on sandstone, which, with a few exceptions, where fossil tertiary limestone occurred, similar to that of the Murray cliffs, was ferruginous sandstone, at the depth of two feet and a half or three feet.

NO. II. LOCALITIES OF THE DIFFERENT GEOLOGICAL SPECIMENS, COLLECTED BY THE CENTRAL AUSTRALIAN EXPEDITION.

1) From the cliffs of the Murray River, both above and below the great
2) north-west bend, bounding the valley of that river, with an average
3) height of 150 or 200 feet.
4)
5 From the sandstone hills on the Murray.
6 From Carnapaga, on the first creek to the N.W. of the Darling River.
7 From station No. 3, on the Barrier or Stanley's Range, Mount Darling.
8 From the Glen of Yancowinna.
9 From the Iron Ridge, south of the Glen of Yancowinna.
10 From Mount Bourke, on Stanley's Range, No. 1 station.
11 From the Iron Stone Hill on the Range (Piesse's Knob).
12 From a central hill on the Range.
13 From a central hill.
14 From Lewis's hill.
15 From the Black Hill Mount Robe.
16 From a valley in the Range.
17 From the bed of the Creek.
18 From the Rocky Glen.
19 From the outer Range to the westward of the Barrier, Station No. 1.
20 From the same, Station No. 2.
21 From the Stony Creek.
22 Gathered from the plains between the creeks to the west of the Ranges.
23 From a distant hill in Stanley's Range--the base.
24 From the summit of the same.
25 From a rugged detached hill.
26 From a small hill near the Range.
27 From the nearer plains.
28 Ditto ditto.
29 From a water-worn hill near Flood's Creek.
30 From Station No. 38, Mount Wood.
31 From the summit of the Range, Station No. 39.
32 From Station No. 40. Mount Lyell, fifty miles east.
33 From some low hills, near Flood's Creek.
34 From the last hill on Stanley's Barrier Range.
35 From the Magnetic Hill, Mount Arrowsmith.
36 From the Table Hill, Mount Browne.
37 From the White Hill.
38 From the Depot Glen.
39 From the Black Hill, Mount Robe.
40 Ditto ditto ditto
41 From the summit of Grey's Range.
42 From the last hill to the north, lat. 28 degrees 26 minutes.
43 From the most distant hill to the north-east.
44)
45) From the Depot Glen.
46)
47}} From the Plains to the north of the Red Hill, Mount Poole.
48}}
49) From various parts of the Depot Glen, and the Range with which it is
50) connected. This Range is separated from the main ranges, but still
51) occupies the eastern side of the high land, running between the eastern
52) and western waters.
53)
54)
55 From the summit of the Red Hill, Mount Poole.
56) From the base of the same hill.
57)
58 From the summit (2nd specimen).
59 From the plains north of the Depot.
60 From the plains.

BOTANICAL APPENDIX ROBERT BROWN, ESQ., D.C.L., F.R.S., F.L.S., etc.

My friend, Captain Sturt, having placed at my disposal the Collection of Plants formed in his recent Expedition into the Southern Interior of Australia, I am desirous of giving some account of the principal novelties it contains.