In the neighbourhood of Adalia the deposition of calcareous matter from the water is so copious that an old watercourse had actually crept upwards to a height of nearly three feet; and the rapidity of the deposition was such that some specimens were collected on the grass, where the stony crust was already formed, although the verdure of the leaf was as yet but imperfectly withered (page 114): a fact which renders less extraordinary M.Peron's statement that the excrements of kangaroos had been found concreted by calcareous matter.

Peron volume 2 page 116.) (*******Footnote.

Voyage 2 116.) The nearest approach to the concreted sand-rock of Australia, that I have seen, is in the specimens presented by Dr.Daubeny to the Bristol Institution, to accompany his excellent paper on the geology of Sicily;* which prove that the arenaceous breccia of New Holland is very like that which occupies a great part of the coast, almost entirely around that island.

Some of Dr.Daubeny's specimens from Monte Calogero, above Sciacca, consist of a breccia, containing angular fragments of splintery limestone, united by a cement, composed of minute grains of quartzose-sand disseminated in a calcareous paste, resembling precisely that of the breccia of Dirk Hartog's Island: and a compound of this kind, replete with shells, not far, if at all, different from existing species, fills up the hollows in most of the older rocks of Sicily; and is described as occurring, in several places, at very considerable heights above the sea.

Thus, near Palermo, it constitutes hills some hundred feet in height; near Girgenti, all the most elevated spots are crowned with a loose stratum of the same kind; and the heights near Castro Giovanni, said to be 2880 feet above the sea, are probably composed of it.