rkable hollow on the right bank at the
extreme western bend of the river. There was no modern indication that
water either lodged in or ran through that ravine although the channel
resembled in width the bed of some considerable tributary; the rock
presenting a section of cliffs on each side and the bottom being broad
but consisting of black earth only in which grew trees of eucalyptus. I
found on following it some way up that it led to a low tract of country
which I regretted much I could not then examine further. I found shells
embedded in limestone varying considerably in its hardness being
sometimes very friable and the surface in some places presenting
innumerable fragments of corallines, with pectens, spatangi, echini,
ostrea and foraminifera.

LIMESTONE CAVERN.

In the opposite bank of the river I found several thin strata of compact
chert containing probably fragments of corallines, not only on the
surface but embedded in the limestone. In pulling up the river this
morning we observed a cavern or opening in the side of the limestone rock
and having ascended to it by means of a rope we entered with lights. It
proved to be only a large fissure and after penetrating about 150 yards
underground we met with red earth, apparently fallen from the surface. We
found at the mouth of the fissure some fine specimens of shells, coral,
and other marine productions, embedded in several thin strata of a
coarser structure under one of very compact limestone upwards of 20 feet
thick.*

(*Footnote. In the fragments brought home Mr. George Sowerby found a
nucula, very much resembling some species of South America although not
like any from Australia. Portions of lucinae, echinus, spatangi, and
turritella or melania, were comprised in specimens from a softer stratum
which was the lowest.)

ONE FISH CAUGHT IN THE GLENELG.

While the people in the boat awaited us there a fish was taken by
Muirhead who had also caught the first fish in the river Darling. That of
the Glenelg was a saltwater fish known at Sydney by the name of Snapper.*

(*Footnote. This was the only fish caught in the Glenelg notwithstanding
the men threw in their lines whenever we encamped on its banks. The
weather was too cold for it was evident the river did contain fish from
the trellised work which the natives had set across it in the upper
parts.)

STORMY WEATHER.

The weather was more moderate today although still showery; and the
scenery as we proceed