vu 
ETTEP V 
OF 
T PyA NS MITTAL. 
Sir, 
Geological Survey Branch, 
Department of Mines and Agriculture, 
Sydney, 12th December, 1906. 
I have the honour to submit for publication Part II of Memoir 
No. 13 (Palaeontological Series) on the Silurian and Devonian Corals of New 
South Wales, by Mr. Robert Etheridge, Junior, Curator of the Australian 
Museum. 
This volume, on the genus Tryplasma, forms the second contribution 
by Mr. Etheridge towards the description and classification of the fossil corals 
which characterise the Upper Silurian and the so-called Siluro-Devonian 
passage beds, particularly along the Murrumbidgee River, in the neighbour- 
hood of Yass. 
Mr. Etheridge’s work is of special interest in view of the importance 
of establishing a dividing line between the Silurian and Devonian rocks of 
New South Wales. 
I have the honour to he, 
Sir, 
Your obedient servant, 
EDWARD E. PITTMAN, 
Government Geologist. 
The Honourable S. W. Moore, M.P., 
Minister for Mines and Agriculture. 
