GREVILLE ISLAND, near the entrance of Prince Regent’s River.  Reddish, coarsely granular, siliceous sandstone; in horizontal strata, intersected by veins of crystallized quartz.*

(Footnote.  Narrative volume 2.)

HALF-WAY BAY, within Prince Regent’s River on the west of the entrance, near Greville Island.  Hornblende rock ? nearly agreeing with that of Pobassoo’s Island, on the north-west of the Gulf of Carpentaria (see above).  Calcedony, apparently from nodules in amygdaloid.  Greenish quartz, approaching to heliotrope.  Red, somewhat slaty jasper, mixed with quartz and chalcedony, and containing specular iron ore.

The specimens from this place much resemble some of those from Sotto i Sassi, in the Val di Fassa in the Tyrol, which I have seen in the collection of Mr. Herschel; and which consist of reddish jasper with chalcedony, and a greenish flinty stone, like heliotrope, the whole belonging to the trap-formation.

POINT CUNNINGHAM, east of south from Cape Leveque, and about one hundred and fifty miles south-west of Prince Regent’s River.  Very compact and fine-grained reddish granular quartz, with a glistening lustre, and flat conchoidal fracture.  This stone, though so compact in the recent fracture, has distinct traces of stratification on the decomposed surface, which is of a dull reddish hue.  Bright red ferruginous granular quartz (Eisen-kiesel ?) with a glistening lustre, and a somewhat porous texture.  A specimen of the soil of the hills at Cygnet Bay, consists of very fine reddish-yellow quartzose sand.  A large rounded pebble, consisting of ferruginous granular quartz, of a dark purplish-brown colour, and considerable density, was found here; near a fireplace of the natives, by whom it is used for making their hatchets; with a fragment of a calcareous incrustation, like that of the west coast hereafter mentioned.

The next specimens in Captain King’s collection—­a space of more than three hundred miles on this coast not having been examined by him—­are from MALUS ISLAND, in Dampier’s Archipelago (see Narrative volume 1) they consist of fine-grained greenstone, and what appears to be a basaltic rock, of amygdaloidal structure.

DIRK HARTOG’S ISLAND, west of Shark’s Bay.  A compound of rather fine-grained translucent quartzose sand, cemented by carbonate of lime, of various shades of reddish and yellowish grey.  This stone has in some places the structure of a breccia; the angles of the imbedded fragments, which are from half an inch to two inches in diameter, being very distinct—­but in other parts, the fracture exhibits the appearance of roundish nodules, composed of concentric shells—­or bags as it were, of calcareous matter, which vary in colour, and are filled with a mixture of the same substance and quartzose sand:  and the spaces between these nodules are likewise occupied by a similar compound.*

(Footnote.  The following description given by the French naturalists of the rocks at Bernier’s Islands, was probably taken from a large suite of specimens; and M. Peron states (1 page 204) that it is strictly applicable to all the adjacent parts of the continent, and of the islands that were examined by the French voyagers: