62 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [June 16, 
Rocks, we come to a mass of shales and calcareous grits and sand- 
stones, which pass into coal beds at Camden, Cabramatta, George’s 
River, &c., and occupy the whole of the interesting basin along the 
South Creek of Wianamatta, in the county of Cumberland, inci- 
dentally alluded to by Strzelecki*. This basin, which I have long 
distinguished by the name of the Wianamatta Basin, is bounded on 
all sides by the Hawkesbury Rocks of the coast ranges and the Blue 
Mountains, and consists of a series of sloping, rounded, water-worn 
shale-beds, capped by summits of nearly horizontal beds of calcareous 
sandstone, which attain, in the Bulbunmatta ranges, and on Moca- 
ragil (or Menangle Sugar Loaf), an elevation of from 600 to 1000 
feet above the sea, and are at least 800 feet thick. 
At Clarke’s Hill, near Cobbitee, and elsewhere, various species of 
Pecopteris occur in a fine sandstone ; on Badjalla Hill, Stigmarie and 
Sigillarie. 
At Wiriouil, near Campbelltown, in the blue shale, immediately 
over the variegated sandstone, I have found casts of heterocercal 
ganoidal fishes, coniferous wood, and a new coral of singular aspect ; 
whilst at Paramatta, at the north-eastern edge of the basin, in the 
same shale, I have found three species of fish, coniferous wood, and 
fragments of ferns, together with casts of the imtestines of sau- 
roidal or other fishes. 
A ganoidal heterocercal fish, apparently similar to one I detected 
at Campbelltown in ironstone, was also found at Newcastle +, 70 feet 
below the sea-level, in a greyish-blue grit; and Mr. Wilton also 
discovered at Newcastle a coralite, named after him by Leichhardt, 
C. Wilton. 
A specimen of Halonia was found by me at Bolborook near 
Paramatta, in a soft micaceous shaly sandstone of the Wianamatta 
Basin, together with numerous casts of species belonging to the 
genera 9 and 10, in the list above, which are characteristic, to a great 
degree, of the Wianamatta ironstones and shales. 
Lycopodites 1 found in soft blue fire-clay at Mulubimba, near 
Newcastle ; and at Wollon Hills; also in the Page River at the back 
of Mount Wingen ; at Foy Brook, on the Hunter; and at Burwood 
Range, near Newcastle, I have found a peculiar species of Cyclo- 
pteris, which has no resemblance, in the thickness of its leaves, to 
any yet figured. 
Equisetacee and Calamites abound not only at Newcastle, but 
all over the Hunter district, and in the Illawarra region. Some 
of the latter, with an elegant Neuropteris, occur in an altered sand- 
stone, at Arowa near Arrawang on William’s River, where the 
carboniferous series rests upon porphyry, and has been mtruded 
into by greenstone and trachytic basalt, which must have partially 
flowed subaérially. Casts of Producti and Spirifers occur there also, 
at a lower level than the metamorphosed coal beds, a contmuation 
of which may be traced as far as the left bank of the Paterson River. 
As my object in this communication has been merely to announce 
* Phys. Des. p. 58. t+ See Phys. Des. p. 125. 
