ae 
COMPARED WITH THOSE OF AUSTRALIA. 79 
XIII.—Lower Devontan. 
fton beds 
These are determined by their fossil contents, and have only 
been distinguished in one locality, viz., Reefton, although from 
their nineral character they are evidently present in many other 
parts the South Island. 
They consist of alternating beds of quartzite, chert, and lime- 
stone, the latter yielding many fossils, of which a few species have 
been (etermined, such as Leptena bipartata, Orthis interlineata, 
=~ speciosa, S. cultrijugata, Chonetes striatella, Homalonotis 
The general character of the fossils from this formation cone 
pares vith the limestone of the hd soo een and near 
Carcoai and Bulubala, in New South W 
XIV.—Upper Smvrian. 
* Baton River series. 
A grat part of the area coloured on the map as metamorphic 
schists should probably be included in this formation, but ‘oe 
have oily been distinguished by their fossil contents in the north- 
west dstrict big o elson, where both Upper and Lower Silurian 
ze 
TheUpper | Silurian rocks consist of grey cherts, sandstones, 
whicha great variety of corals and corallines occur ; crinoids also 
are vary abundant, 
Sone few of the species are identical with those found in the 
lover devonian beds of Reefton, whilst others occur in the lower 
Strian rocks of America, but the prominent facies of the collee- 
tins i is undoubtedly upper siluria: n, Orthi. is crassa, O. Aine 0. 
ulsoni, Murchisonia eck Calman th umenbachii, Homa- 
ils are found in the limestones in Yass and Hume 
wei in N.S.W., and in the Gordon River limestones of Tasmania. 
XV.—Lower SILURIAN. 
Mount Arthur series. 
These rocks form the mass of Mount Arthur, and the range to 
t north-east as far as Separation Point, and they consist chiefly 
oa dark metamorphic bituminous schist, associated with a blue 
