BY A. B. WALKOM ll 
hardly be separated from one another, and there is reason 
to regard the Upper Coal Measures as Permian in age. To 
abandon the term ,Permo-Carboniferous before a satis- 
factory solution is obtained would probably cause much 
confusion, and in a recent paper I have followed the method 
of writing the name Permian (Permo-Carboniferous). 
The distribution of the typical Glossopteris flora is 
indicated approximately in figure 2. 
QUEENSLAND Mesozoic FLORAS. 
When we pass on to rocks of Mesozoic age there is 
very abundant evidence of the plant life of the time in the 
presence of five distinct floras. The earliest of these is 
quite distinct from the Upper Paleozoic floras, and is 
indeed separated from the latest Paleozoic flora in 
Queensland by a considerable time interval. In New South 
Wales, there is an apparently conformable passage in places 
from the Upper Coal Measures to the Narrabeen Series 
and in places there is a slight mingling of the two floras. 
But in Queensland there are no Lower Triassic sediments, 
and consequently there is a distinct break between the 
floras of Paleozoic and Mesozoic age. Between the 
various Mesozoic floras, however, there is no such distinct 
break, but the floras themselves are distinct from one 
another. There are certain species which are present in 
more than one of the floras, but there are quite sufficient 
forms characteristic of each one to make them distinct. 
In addition, we can also take into account the general aspect 
of the flora and the proportions of the larger plant groups 
present. 
These Queensland Mesozoic floras constitute a very 
good example of the value of a careful examination of fossil 
plants in stratigraphical geology. The whole of the 
Mesozoic Strata, from the Ipswich Series below to the Burrum 
Series above, appear to be quite conformable, but the floras 
of the different Series are distinct, and sufficiently so to 
enable their positions in the Geological Record to be fixed 
with a fair degree of certainty. They show the Ipswich 
Series to be Upper Triassic in age, the Walloon Series 
Lower Jurassic, and the Burrum Series Lower Cretaceous. 
