92 PROCEEDINGS OF THE ROYAL SOCIETY OF QUEENSLAND. 
massive sandstones, identical with, those occurring at Brighton, in por- 
tions 21, 434, and 89v, parish of Redcliffe. Bryan, moreover, has recorded 
(1927b, p. xi.) non-calcareous oolite, similar to that found near the base 
of the Walloon Series, from the north bank of the Pine River, about three 
miles from its mouth. 
Outcrops of sandstones of Ipswich aspect have also been noted near 
the Sandgate Cemetery and along Bracken Ridge in portions 97 and 98, 
parish of Nundah, about one mile east of Bald Hills. This, together with 
the complete absence of Tertiary exposures', to the E. of Bracken Ridge, 
may mean either that the eastern margin of the series is approximately 
one mile W. of that shown on Jones’ map, or that Bracken Ridge itself 
is an inlier within the Petrie Series. Unfortunately the low-lying nature 
of the country and the absence of shaft sinkings in the area to the east 
of Bracken Ridge still prevents any accurate mapping of the eastern 
margin of the series. 
However, from field observations, it can definitely be stated that the 
boundary of the Petrie Series in the Bald Hills Creek to Cabbage Tree 
Creek sector at least is no further to the E. of that approximately deter- 
mined by Jones and shown on his map (1927, map 2). 
With reference to structure it may be mentioned that the Mesozoic 
sandstones and shales which outcrop E. of the Petrie Series have a 
general dip to the S.W., and that, following Dunstan (1919, p. 53), the 
structure may be interpreted as a synclinal trough, the central and 
western portions of which are unconformably overlain by the Petrie 
Series in the area under consideration. 
IY. PALAEONTOLOGY. 
Very few fossils have previously been found in the Petrie Series. 
In 1925 Morton found a dicotyledonous leaf in almost vertical sandstones 
about one and a-half miles W. of Strathpine railway station, which 
proved the series to be of Tertiary age. Subsequently Jones (1927, p. 36) 
collected two leaves and a probable seed pod from the same outcrop, 
but, in spite of much search, failed to find any other fossils in the series. 
In 1932 Ball (1932a, p. 221) observed a few indistinct carbonised plant 
impressions together with one small mussel-like shell and some small 
sandy, probably coprolitic, patches containing fish scales and bones, in 
the oil shales on portion 190, parish of Warner, some two miles west of 
Strathpine railway station, and approximately one mile N.W. of the 
sandstone outcrop referred to above. Shortly after this, Ball (1932b, 
p. 384)^ also discovered numerous small kidney-shaped bodies identified 
by Whitehouse as ostracods allied to the common freshwater genus 
Cypris, together with fragmentary fish remains, some fruits of inde- 
terminable plants and one small gastropod, in the shales on the spoil 
heap of Simpson’s well in the N.E. corner of portion 186, parish of 
Nundah, about one mile E.S.E. of Bald Hills. Subsequently Chapman 
(1932, p. 384) reported on the ostracods contained in this material, and 
stated that their generic affinity was very obscure and that they could 
be referred to as (?)Cyprids only. In 1934 E. S. Hills (p. 169) 
described the fragmentary fish remains collected by Ball from the oil 
shales two miles W. of Strathpine, and from Simpson’s well E. of Bald 
Hills, as belonging to a freshwater Percoid fish, probably of the genus 
Percolates. The very fragmentary nature of the material, however, was 
insufficient to indicate more than that the shales were of Tertiary age. 
