?6 APPENDIX. [C. hies of a Porphyritic rock, which itself contains a consider- able proportion of this substanee.--And Mr. Oreenough has recently received, among specimens sent home by Mr. Burton, junior, a mass of compact epidote, with quar? and felspar, from Dokban, in the desert between the Eed Sea and the Nile. When New Holland is added to these localities, it will appear that few minerals are more widely diffused. III. The unpublished sketches, by Captain King and Mr. Roe, of the hills in sight during the progress of the survey of the Coasts of Australia, accord in a very striking manner with the geological character of the shore. Those from the east coast, where the rocks are. primitive, ,representing strongly marked and irregular outlines of lofty mountains, and frequently, in the nearer ground, masses of strata highly inclined. The outlines on the contrary, on the north, ?orth-west, and western shores, are most com/nouly uni- form, rectillnear,--the summits flat, and diversified only by occasional detached and conical peaks, none of which are very Iol?. IV. No information has yet .been ob?n?d, from any of the colloctions, respecting the diluvial deposits of Australia: a class of phanomcoa which is of the highest interest? in an island of such vast extent, so very remote in situation, and of ?rhich the existing animals ar? so differant from those of ot? parts'of t? gloW. It is remarkable, also, tha? no !iu?-?one is among the spoeimem from ? no?ern aad? western shores, except that of the recent brecela though negativs conclusions are hazardous, it. wonid seem probable, from this circumstance, that !ime-stona c?nnot be vary abundant or conspicuous a? the places visited.-- No eruptive mou. n?ns, nor any traces of recent' volcanic eruption, have yet been observed in any part of Australia.
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