16 Transactions. 
Australia, the metamorphic complexes of uncertain age, and oa pos 
Cambrian granites and diorites. In the palaeogeographie maps 2-1 À ча 
is inevitably great uncertainty concerning the former distribution : ni 
and land in the vast and now submerged areas east of Australia, rt : 
outlines are merely suggestions which accord with some of the = з ? 
distribution of fossils or rock-types, and are not opposed by any other gi 
known to the writer. These do not depart more than seemed desirable 
from the earlier suggestions of Schuchert for the Palaeozoic times and Wa ves 
for the Mesozoic. The bulk of the literature concerning the particu 
In the Cambrian period a continental mass stretched from the west 
of the present coast of Australia at least to the western borders of the four 
s synclinal zone seems to have continued from pre-Cambrian times. 
In the Adelaide region, unconformably on a probably Algonkian complex 
of schists invaded by diorites and syenites, there is a thick series of 
sediments, basal grits, phyllites with 
followed by thick tillites, banded 
shales, and further limestones and shales. 
considers of Lower Cambrian a 
ancient crystalline com 
of Adelaide (Howe 
lan, wnat а disconformity must exist between these and 
the Archaeocyathinae limestones, which he considers to be definitely Lower 
Cambrian. This last 1з the view of Walcott (1916), who has examin 
While pa ^ 5 T 
geo ogy of the eastern and | ›ссезв Was obtained to the valuable summaries 
log: western rtio ns of the M i wer 
and Van Es (1919) 4 5 : f t Ialay Archipelago by Brou 
of the 
(1919) ; y ч 
these, but some data therefrom are incorporated um permitted à complete study 
