612 APPENDIX. [C. Mm, vua? BAT.--Ora?te, composed of gre! and some- what bluish felspar, dark brown mica, and a little quartz; �containing minute disseminated specks of mo/y6dea? and indistinct crystals of pale re?l 9araet. Rno CLzrrs, south-west of Arehem Bey ;--on the line of the first chain of islands mentioned by Captain Fiinders. (See the Map, p. 600, fig. 3.)---Friable conglomerate, of a full brick-red colour, consisting of minute grains of quart? with a large proportion of ochrenun ma_?er. M?LLISON'S ISLAND. (Map, p. 600, fig. 4.)--The cliffs of this island are composed of a fissile primitive rock, on which �sand-stone reposes in regular beds. The specimen of the former resembles gaeiu, or m/ca date, near the contact with granite: the saad-stoue is thick?slaty, quartz?e, of a reddish hue, with mica disseminated on the surfaces of the joint8; and one fm:e of the specimen is incrusted with quartz crys- tals, thinly coated with botryoidal hematite. Light gre! ?uartzo?e mad-stone of a fine grain, with a thin coating of brown hematite, was also found in this island :--And a brecc/a, consisting of angular fragments of sandstone, ce* mented by thin, vein-like, coatings of dark brown henre- rite, was found there, in loose blocks at the bottom of per- pendicular cliffs.--The specimen of this breccla is attached to a plate of granular quarts, and may. possibly have been part of a vein. �The shore of INems's ISLAND, the largest of the ENOLISH COxrA?r's R,r?eB, (2. 2. 2. in the Map, p. 600,) is formed of fin beds, of a slaty argillaceous rock, which breaks ? rhomboidal frs?nents; but the specimen is indistinct. Fer- ruginous mines, probably consistln? of bro?a Aesust/te, come ?!so from ?is island.
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