n King, about sixty
miles south of Cape Capricorn.* Reddish sandstone, of moderately-fine
grain, resembling that which in England occurs in the coal formation, and
beneath it (mill-stone grit). A sienitic compound, consisting of a large
proportion of reddish felspar, with specks of a green substance, probably
mica; resembling a rock from Shap in Cumberland.

(*Footnote. In Captain King's collection are also specimens found on the
beach at Port Macquarie, and in the bed of the Hastings River, of common
serpentine, and of botryoidal magnesite, from veins in serpentine. The
magnesite agrees nearly with that of Baudissero, in Piedmont. (See
Cleaveland's Mineralogy 1st edition page 345.)

CAPE CLINTON, between Rodd's Bay and the Percy Islands. Porphyritic
conglomerate, with a base of decomposed felspar, enclosing grains of
quartz and common felspar, and some fragments of what appears to be
compact epidote; very nearly resembling specimens from the trap rocks* of
the Wrekin and Breeden Hills in Shropshire. Reddish and yellowish sandy
clay, coloured by oxide of iron, and used as pigments by the natives.

(*Footnote. By the terms Trap, and Trap-formation, which I am aware are
extremely vague, I intend merely to signify a class of rocks, including
several members, which differ from each other considerably in
mineralogical character, but agree in some of their principal geological
relations; and the origin of which very numerous phenomena concur in
referring to some modification of volcanic agency. The term Greenstone
also is of very loose application, and includes rocks that exhibit a wide
range of characters; the predominant colour being some shade of green,
the structure more or less crystalline, and the chief ingredients
supposed to be hornblende and felspar, but the components, if they could
be accurately determined, probably more numerous and varied, than
systematic lists imply.)

PERCY ISLANDS, about one hundred and forty miles north of Cape Capricorn.
Compact felspar of a flesh-red hue, enclosing a few small crystals of
reddish felspar and of quartz. This specimen is marked "general character
of the rocks at Percy Island," and very much resembles the compact
felspar of the Pentland Hills near Edinburgh, and of Saxony. Coarse
porphyritic conglomerate, of a reddish hue. Serpentine. A trap-like
compound, with somewhat the aspect of serpentine, but yielding with
difficulty to the knife. This specimen has, at first sight, t