Mem. Nat. Mus. Vict., VIII, 1934. 
GRAPTOLITES OE VICTORIA ; NEW SPECIES AM 
ADDITIONAL RECORDS. 
R. A. Keble, F.G.S., Palaeontologist, and W. J. Harris, B.A., 
Hon. Palaeontologist. 
Plates XX-XXII. 
Nine new species and three new varieties of Graptolites are 
described below and several species are recorded in Australia 
for the first time. Monograptus aplini T. S. Hall and Stomato- 
graptus australis (McCoy) are redescribed. Except where other- 
wise indicated specimens quoted are in the collections of the 
Geological Survey of Victoria. All drawings were made with a 
camera lucida. 
Of the new species, Pterograptus lyricus is probably the most 
graceful graptolite known ; Tetragraptus chapmani and Crypto- 
graphs circinus have unusual structural characters ; and 
Retiograptus pidcherrimus and Stomatogr aphis australis clearly 
show the internal clathria. 
Several species are common to more than one province. 
Diplograptus ( Glyptograptus ) euglyphus occurs in Australia, 
Europe and America ; D. (G.) euglyphus var. sepositus in 
Australia and New Zealand ; and Monograptus pandus in 
Australia and Europe. The following Australian species here 
described have closely related European representatives : — 
Didymograptus acriculus in D. euodus Lap worth, Pterograptus 
lyricus in P. elegans Holm, Climacograptus subminimus in C. 
minimus (Carruthers), Monograptus spiralis var. permensus in 
M. spiralis Geinitz. The Australian species Glossograptus 
pilosus has an American representative in G. hystrix Ruedemann, 
and Didymograptus mendicus has a New Zealand representative 
in D. bidens Keble. 
The stratigraphical classification adopted is that of Thomas 
and Keble (14) for the Silurian and Upper Ordovician, and that 
of Harris and Keble (9) for the Lower Ordovician, as shown in 
the following table. 
Period. Series. Zones. 
| Melbournian 
Silurian . . . . . . . . Yeringian 
( Keilorian 
j Bolindian 
Upper Ordovician Eastonian 
( Gisbomian 
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