Geology.] 
NATURAL HISTORY. 
Rocks of the Trap Formation. 
Serpentine 
Sienite .... 
Porphyry 
Porphyritic Conglomerate . 
Compact Felspar 
Greenstone , 
Clinkstone 
Amygdaloid, with Calcedony 
fVacke ? ... 
Port Macquarie; Percy Isles. 
Rodd’s Bay. 
C. Cleveland. 
C. Clinton, Percy I., Good’s I. 
Percy I., Repulse Bay, Sunday I. 
Vansittart Bay, Bat I., Careening 
Bay, Malus I. 
Morgan’s I., Pobassoo’s I. 
Port Warrender ; Half-way Bay; 
Bat I.; Malus I. 
Bat Island. 
Recent calcareous Breccia' . Sweer’s I., N. coast. — Dirk Har- 
tog’s and Rottnest I., S^c., W. 
coast. — King George’s Sound, S. 
coast. 
The only information that has been published respecting 
the geology of New Holland, besides what is contained in 
the Voyages of Captain Flinders and Commodore Baudin, 
is a slight notice by Professor Buckland of some specimens 
collected during Mr. Oxley’s Expedition to the River Mac- 
quarie*, in 1818; and a brief outline of a paper by the 
Rev. Archdeacon Scott, entitled “ A Sketch of the Geology 
of New South Wales and Van Diemen’s Land,” which has 
been read before the Geological Society f. On these autho* 
* Geol. Trans, vol. v. p. 480. 
t Ann. of Phil. June, 1824. 1 am informed that Mr. Von Buch 
also has published a paper on the rocks of New Holland ; but 
have not been so fortunate as to meet with it. 
Since this paper has been at the press, a Report presented to 
the Academy of Sciences' at Paris, on the Voyage of Discovery of 
M. Duperrey, performed during the years 1822 to 1825, has been 
published ; from whence I have subjoined an extract, in order to 
