Brenson.—Palaeozoic and Mesozoic Seas in Australasia. 29 
that the analogous eastern Asiatic and Australian Upper Devonian fauna 
was due mainly to an offshoot from this which passed along the western 
shores of the Pacific. It is worthy of note, however, that there is in the 
Australian Devonian faunas no community whatever with the (Lower 2) 
Devonian fauna of South Africa and South America, of which Clarke (1913) 
has given a comprehensive account. This may indicate that the Ant- 
arctic marine channel of migration, which was to become important in Upper 
Cretaceous times, was not yet.in existence. 
Carboniferous. 
The characteristic Lower Carboniferous (Burindi) beds are confined to 
the eastern gulf in New South Wales. They follow in apparent conformity 
on the Upper Devonian mudstones at all points which the writer has observed 
along a line of contact of over one hundred miles in length (Benson, 1918), 
E CARBONIFEROUS 
SEX PERIOD — 
cloro MUSS ot e тс: 
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SENS ин РЕ —— 
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m is, — 
Lo ee ee Dx. dup ———— —— 
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e om eee So =: 
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: сузу с» 6. «X о es s 
GERD Upper Carboniferous МЕ. Yi шс г, 
lasting into Permian times ` ` ^ e E ш» 
SS Upper Carboniferous (2) Ausw/ina Sea (a E Ln m 
" ^" п " - 
sf . LQIm— * > ai eo. . è 
E Lower Corbonife Sea [E] f, ; > ; oi 
rboniferous Sea FEE Exposures of marine sediments ^ ‘°° °° c 
though it is possible that some disconformity may exist between them, as 
the faunal change is so marked; indeed, the absence of any sign of ‘the 
late Upper Devonian fauna between the Middle Devonian and the Lower 
Carboniferous fossiliferous beds is in itself suggestive of the existence of a 
break in this apparently continuous series of sediments. This would accord 
with the view of Siissmilch (1914, 1921), though it is opposed to the writer’s 
former belief. iissmilch, indeed, believes that away from the region of 
deposition of the Lower Carboniferous marine sediments there was viii 
orogeny at the close of Devonian time, accounting for the intrusion of 
кы а е реи Devonian quartzites west of the Blue Mountains, 
nites have i 1 
8 к een since laid bare and covered by Permo-Carboniferous 
