Benson. Palaeozoic and Mesozoic Seas in Australasia. 19 
Ptychoparia. These beds are strongly folded and followed conformably by 
Lower Ordovician rocks (Skeats, 1908; Chapman, 1904, 1911, 1918a ; 
Asiatic-American fauna. 
No New Zealand rocks have been proved to be of Cambrian age 
on definite palaeontological grounds, though if the Upper Cambrian age of 
the basal Lancefield beds is sustained it is probable that the graptolite 
slates of Preservation Inlet, in the south-western extremity of the South 
Island—which Hall (1915) referred to the basal Lancefield beds because of 
the occurrence of Bryograptus, Clonograptus, and Tetragraptus in them— 
should also be of Upper Cambrian ag ccording to Park (1921), an 
extensive series of unfossiliferous sediments lies stratigraphically beneath 
hese. 
Ordovician. 
The coastal zone now passed through western Tasmania, Victoria, and 
New South Wales, bending north-eastwards into Queensland. In Tasmania 
the littoral deposits were breccias and sandstones and slates with indefinite 
graptolitic markings (Callograptus ?). In the Permo-Carboniferous glacial till 
deposits are scarcely recognizable, but the Lower Ordovician graptolitic 
slates are well developed in the western half of the highlands of Victoria, 
*See also Hills (1921). The writer is greatly indebted to Mr. Hills for furnishing 
"wf + 
him with a résumé of this useful paper in advance of publication. 
