486 
THE SILURIAN TRILOBITES OF NEW SOUTH WALES, 
WITH REFERENCES TO THOSE OF OTHER 
PARTS OF AUSTRALIA. 
By R. Etheridge, Junr. — Curator of the Australian Museum 
— and John Mitchell, Public School, Narellan. 
Part III. 
The PHACOPID^E. 
(Plates xxxviii. -xl.) 
The family of the Phacopidse is one of the most important to 
be met with in our Lower Paleozoic rocks, both on account of 
the wide distribution of its members geographically — being met 
with in the Silurian rocks of both N.S. Wales, Victoria, and Tas- 
mania — and their close connection with those of similar deposits 
in the Old World. 
The literature of the family is very limited, and is confined to 
the description by Sir F. McCoy of species referred* by him to the 
following : — - 
1. Odontochile caudatus, Brim., sp. 
2. Portlockia fecundus, Barr., sp. 
and by Mr. A. F. Foerstef to — 
3. Phacops serratus, Foerste. 
The horizons yielding these fossils are : — 
a. Olive mudstones of Broadhurst's Creek, near Kilmore, Vic- 
toria — -No. 1. 
b. Arenaceous beds of Yerring, Upper Yarra, Victoria — No. 2. 
c. Olive-brown mudstones of the Bowning District, N.S. 
Wales— No. 3. 
* Prod. Pal. Vict. 1876, Dec. iii. pp. 13-16. 
f Bull. Sci. Lab. Denison Unir. 1888, iii. 
