New South Wales . 
79 
“ Gangamoptcris [“ The genus only. — W.T.B*”] This form is 
not known at all from those heels intercalated with Marine 
fossils, hut from really Mesozoic beds in Victoria, 
associated with Twniopteris Daintrcei \ M‘Coy. 
“ Vertchraria [“ One species identical W.T.B.”] There is as 
yet no full description of the Australian Vertehraria, and 
that which is known seems to be quite different from 
ours. The greatest portion of our Damuda Vertchraria 
are probably not identical with those from Australia. 
11 Pccopteris (A lethoptcris) [“One species, probably identical, 
AY .T.1V] I doubt whether our A. Lindlcgana can be 
united with A. Australis , AT Coy, or if this is altogether 
the case >vith any other species. 
“ Thus it seems that the evidence of a connection with the 
Australian Coal Measures is very weak, while the fossils enumer¬ 
ated as common with European Trias are unmistakably identical. 
“ As to the strutigraphy of the Australian Coal strata , the litera¬ 
ture is not poor, but yet it is not in all points quite clear and 
always trustworthy. 
“ It is well known that there can be a complete concordance 
in the stratification of rocks, and yet two or more different 
formations may be represented which can only be distinguished 
by the prevailing fossil forms.* As an instance I can quote the 
Salt Range in India, where, as Air. Wynne tells us, the Lower 
Marine Carboniferous and the Triassic rocks are conformably 
deposited, and yet ihey are different in age, although a well- 
marked Carat] l es and j Rhijllotheea go down into the Carboni¬ 
ferous rocks, and marked forms of Bcllerophon survived into the 
Trias. The same relations will have to he applied to the two 
portions of the Australian Coal Measures, only that here the ease 
is illustrated in the flora. 
“ Tor the stratigraphical grouping of the Coal-strata of New 
South Wales, we must especially take the Rev. W. 13. Clarke’s 
observations, which to a great extent are published (“ Remarks T 
fyc.f 1875) ; partly Air. Clarke communicated them to me in two 
letters ; and he sent also a suite of fossils for comparison. Erom 
all his clear communications it is plain that there are two very 
distinct portions in the Australian Coat Measures: — 
“ a. — Upper Coal Measures. 
“ h. — Lower Coal Pleasures. 
“ a . — The Upper portion is marked by a flora which is 
abundant. Nos. 1, 2, 3 of Mr. B’s list must be referred 
to this; they contain no Marine fossils to indicate a 
connection with the lower portion. 
* See a very remarkable instance of this referred to by me, at p. 31, of 
t lie position of the Palreozoic formations at a locality in Spain, described by 
Casiano de Prado. — W.B.C. 
