311 
Geological Society of London. 
the internal web, green at the base of the external web, blue for 
the remainder of its length, and slightly tipped with white; the 
remainder of the tail-feathers are deep blue at the base of the 
external, and black at the base of the internal web, the remaining 
portion of both webs being pale delicate blue, passing into white 
at the tip ; sides of the breast and the abdomen bright gamboge- 
yellow; vent pale green in some, in others pale bluish green; 
under tail-coverts scarlet; irides dark-brown; bill horn-colour; 
feet mealy brown. 
Total length, 12 inches; bill, g; wing, 6; tail 7; tarsi, f. 
Another specimen, probably immature, has the general colour 
similar, but has the head and breast pale yellow, interspersed with 
scarlet feathers. 
Hab. Darling Downs, New South Wales. 
Remark .—Very nearly allied to, but a more beautiful species 
than, the Platycercus eximius, from which it differs in the extent 
of the scarlet on the breast, which in this species merely occupies 
the centre, while in the former it forms a broad band across the 
breast; the rump also is of a paler green. 
GEOLOGICAL SOCIETV OF LONDON. 
February 24, 1847. 
A paper. was read by J. Jukes, Esq., ‘ On the Paleeozoic Forma¬ 
tions of New South Wales and Van Diemen’s Land.’ The author 
began by stating that the county of Cumberland, in which Sydney 
is situated, is composed of palaeozoic rocks of great thickness; 
and he described, in detail, a section from Liverpool, at the level 
of the tidal waters of the George’s River, to Wollagong,—a dis¬ 
tance of 38 miles to the south. The strata, which are greatly 
inclined, and repose conformably on each other, are as follows, in 
descending order:—1. Black and brown slabs, containing frag¬ 
ments of vegetable matter and fishes (?), at least 300 feet thick. 
2. White and yellow sandstones, containing no fossils: of great 
thickness, not less than 700 or 800 feet. 3. Alternating slabs and 
sandstones, 400 feet thick. 4. Coal measures, with thin seams 
of coal, 200 feet thick. 5. Compact sandstone, with calcareous 
