50 
GRAPTOLITES OF AUSTRALIA 
lite succession of Australia differs from that of Europe, and 
more closely resembles that of America, where, in the opinion 
of Ruedemann, the succession differs from that of Europe. 
T. W. E. David (118) deals with the Upper Ordovician rocks 
at Omeo and Mitta Mitta in Victoria which he states pass 
into New South Wales where, he says, they “lie in several 
parallel belts, of which the most easterly nearly follows the 
coast line to Batman’s Bay, and thence perhaps trends inland 
to Tallong, near Marulan. The rich gold-bearing saddle- 
reefs of Hargreaves traverse Upper Ordovician rocks. The 
most westerly belt as yet proved strikes from the Forbes- 
Parkes area to Tomingley and Myall Reefs, also a gold- 
bearing zone.” 
He defines the limits of the Ordovician sea and the 
direction of the old shore-line. “East of this shore-line,” 
he says, “there is a great development of Ordovician rock of 
a pelagic graptolite type belonging to this sea. These extend 
southward into Tasmania and northward into New South 
Wales right up to the Queensland border. This sea, probably 
continuous with the Lara]iintine Sea, spread over much of 
eastern Queensland as well, but so far no fossils have been 
found belonging to the eastern extension of the sea, except 
in the south-east extremity of the State, near Point Danger. 
There a Diplogmptns has been identified in the local Brisbane 
schists, which there belong to either the top of the Ordovician 
( ?) Bunya Series or to the base of the Silurian ( ?) Neran- 
leigh Series. A long intermittent belt of Upper Ordovician 
rocks, characterized by veins of turquoise and other hydrous 
phosphates, extends from the Ovens River, Victoria, through 
Bodalla and Murwillumbah in New South Wales, the Neran- 
leigh and Bunya Series of Brisbane, and the cherts of Glad- 
stone and Yeppoon, to Innisfail, south of Cairns, Queensland. 
The uniform character of this phosphate zone suggests a 
more or less continuous development of Upper Ordovician 
rocks, along the eastern sea-board of Australia, for the 
distance of about 1,700 miles.” 
In regard to the Silurian, he gives a tentative correlation 
of the Silurian rocks of the Commonwealth. The graptolite 
assemblages of Victoria are, for the “Studley Park Bed,” 
Monocjraptus nilssoni and M. colonus; the “Jordan Series,” 
M. priodon, M. diibins, RetioUtes australis; the “Keilor 
Beds”(upper part), Monograptus riccartonensis ; the “Keilor 
Beds” (loAver part), M. turriciilatus, M. exiguus, M. aplini; 
the “Mount Useful Series” of the Walhalla Geosyncline, M. 
convolutus. He records Monograptids in the Hume Beds of 
