40 
GRAPTOLITES OF AUSTRALIA 
Lower Ordovician of New Zealand, the Upper Ordovician of 
Victoria and New South Wales, and the Silurian of Victoria. 
He states that graptolites have been recorded from Tasmania, 
but that the horizon and the locality is uncertain. 
He figures many of the better-known graptolites from the 
Ordovician and Silurian. 
1915. — T. S. Hall (80) stated that the graptolite-bearing 
rocks of Victoria occupy about 20,000 square miles. The 
Upper Ordovician strata range north from eastern Victoria 
300 miles into New South Wales. He expressed the opinion 
that the Victorian, not the British, sequence will be found in 
New Zealand. “Broadly,” he continued, “the sequence of 
Australian graptolites agrees with the European, but in 
details is closer to that of New York, as Ruedemann has 
pointed out. The important differences in the range of 
Didymograptiis hifidus, D. caduceus, D. nicJiolsoni, Logano- 
graptus, Clonograptus rigidus and some other genera and 
species negative the idea that graptolite zones are world- 
wide, and as no one believes that all the genera and species 
originated in one locality and radiated thence, this is what 
we should expect.” 
1916. — W. J. Harris (81) worked on an area in the Castle- 
maine District somewhat more extensive than that previously 
worked by T. S. Hall (28). He examined all but three or four 
of the outcrops visited by Hall and paid tribute to the 
accuracy of the latter’s observations. He revised Hall’s sub- 
divisions of the Castlemaine and defined the Darriwil. The 
subdivisions proposed by Harris were as follows : 
Series and Locality of Zone Fossils 
Division Typical 
Development 
Darriwil (W. 
J. Harris and 
T. S. Hall) 
Upper Guildford- Glossograptus sp. 
Strangways indet. 
Road Trigonograptus 
Las\:ograptus 
(absence of C. 
morsus) 
Middle Guildford- C. morsus 
Strangways Trigonograptus 
Railway (absence of 
Oncograptus) 
Other Characteristic 
Fossils 
Diplograptus cf. 
angiistifolius. 
D. gnomonicus sp. 
nov. 
Didymograptiis 
caduceus. 
D. v-deflexus sp. nov. 
Diplograptus gno- 
monicus sp. nov. 
Didymograptus cadu- 
ceus 
D. v-defle.rus sp. nov. 
Phyllograptus sp. 
