BY W. N, BENSON. 509 



The fossil content of this series is small. In the northern por- 

 tion, near Slaughterhouse Creek, Mr. G. A. Stonier (6c) found 

 some leaf -fragments resembling Rhacopteris. In the continuation 

 of these beds down into the Newcastle region, a larger flora is de- 

 veloped, the following being the chief species : — 



Catamites (Archceocalamites) radiatus Feistmantel. 



Lepidodendron veltheimianum Feist. 



L. volkmannianum Feist. 



L. dichotomum Feist. 



Knorria Feist. 



Cyclostigma austral e Feist.; n.s. 



C. kiltorkense (?) Feist. 



Anemites ovata Arber, Dun, = Rhacopteris incequilatera Feist. 



Rhacopteris intermedia Feist., Dun; n.s. 



R.(T) rcemeri Feist. 



R. septentrionalis Feist.; n.s. 



Archaopteris wilkinsoni Feist.; n.s. 



Cardiopteris polymorpha Dun. 



Sphenopteris clarkei Dun; n.s. 



Sphenophyllum sp., Feist., = Anemites(1) sp., Dun. 



In the above list, the names given are those of the palaeobotan- 

 ists who recognised the occurrence of the several species in New 

 South Wales; n.s., indicates that the species was not known else- 

 where. Mr. Arber has kindly pointed out to the writer, that all 

 the genera are found in the European Lower Carboniferous, and 

 many of the species are characteristic of that Series. It seems 

 justifiable, therefore, to consider these plant-beds as of Lower 

 Carboniferous age, though they form the upper portion of the 

 Carboniferous Series proper, as developed in Northern New South 

 Wales. 



The vertical extent of the Rocky Creek Series is unknown; in 

 the type-locality, a thickness of at least 2,000 feet is exposed. 



Such then is the sequence of the older palseozoic sediments. We 

 may now revert to Devonian times, to consider the igneous succes- 

 sion. The spilitic flows and tuffs of the Woolomin and Tamworth 

 Series have already been described. Connected with these, there is 

 a great development of dolerite, often albitised(14). In the pre- 



