26 Transactions. 
Territory. To the east it may have been limited at first by the ridge now 
shown by the Brisbane schist, but Ball’s (1921) discovery of Heliolites at 
Warwick beneath the strongly folded Permo-Carboniferous beds indicates 
that this barrier was flooded over at least in the latter part of Middle 
Devonian times, when a commingling occurred of the forms in this (the 
eastern) and the Queensland (or north-eastern) gulf. Richards (private 
communication) has found that the Devonian limestones near Warwick are 
associated with radiolarian claystone and tuffs like those which are so wide- 
spread in north-eastern New South Wales, as the writer’s investigations 
have shown (e.g., Benson, 1915). : 
The Middle Devonian beds in the eastern gulf have no visible foundation. 
They are an extensive series of radiolarian claystones with much tuff and 
three intercalated widely extending coral limestones. The lowest of these, 
Мм 
ee Й ee nC 
bn, у 0 - LI L . n 
C=] Land Area — eee 
Late Upper Devonian Sea Ас iy X: recien 
ERI Early Upper Devonian?) Sea = a EES 
Middle Devonian Sea ж 
; Exposed marine sediments 
Qo UN uH RET 
Which may be teferred to the early Middle Devonian period, contains 
Favosites basalt т. moonbiensis, F. multitabulata, and other aper 
tains a large coral fauna characterized by Heliolites ротоѕа, 
an endemic form Sanidophyllum, S | no 
— 1 оры нт, Bpongophyllum, Endophyllum, Actin 
a Microplasma, Litophyllum, and the characteristic Givetian brachiopod 
—.. Stringocephalus. In the radiolarian mudstones associated with this lime- 
Stone, casts of Lepidodendron australe are frequently present, and continue 
