GRAPTOLITES OF AUSTRALIA 
29 
priodon from Macclesfield and M. cf. dubius from South 
\ arra ; he also mentioned other occurrences. He thought the 
record of Pli i/llograptus (34) in New South Wales is doubt- 
ful. 
He described and figured Tetragmptiis projectus sp. nov. 
and T rigonograptus ivilkinsoni sp. nov. He also commented 
on and figured Didymograptus gracilis Torn., Leptograptus 
antiqiius T. S. Hall (now Bryograptiis antiquus), Dicfio- 
graptus ocfonarius, Clonograptus tenellus and Bryograptus 
victoriae. 
1900. — W. S. Dun (41) recorded from the Coolgardie Gold 
]\Iine G.L. 14, Parish of Clarendon, County of Bathurst, New 
South ales, at a depth of 150 feet, a number of specimens 
of Biplograptus.. He could not say whether they were Ordo- 
vician or Silurian. 
T. S. Hall (42) described and figured a number of grapto- 
lites from Mandurama, New South Wales, including Climaco- 
graptus affinis sp. nov. and Biplograptus mnnduramae sp. 
nov. The graptolites were associated with radiolaria and 
Agnosfus. 
1902. — T. S. Hall (43) considered that the evidence of 
transgression in the case of graptolites is somewhat stronger 
(than in other groujjs), and is more clearly seen, as the 
collecting in part of our (Victorian) Lower Ordovician has 
lieen done zonally. “I have elsewhere (39) shown,” he 
continues, “that on the same slabs of rock at Lancefield we 
find Bryograptus and Clonograptus tenellus, which in Europe 
are exclusively Cambrian, associated with Didymograptus, 
Tetragraptus, Clonograptus flea'ilis, C. ridigus, Phyllo- 
g rapt us, and two species of Bictyonema which are just as 
typically Lower Ordovician in Europe. In America Clono- 
graptus flexilis is associated with such forms as occur at 
Bendigo, the next horizon above the Lancefield beds, which 
do not contain them, while C. rigidus is found with Logano- 
graptus logani. Now, in Australia, the last named does not 
j)ut in an a]>pearance till the rich fauna of Bendigo and a 
great part of the Castlemaine series, which is younger than 
the Bendigo series, has disappeared entirely (cf. 131). 
Another example may be quoted. The group characterized 
by Didymograptus hifidus (cf. 151) ‘the tuning-fork grapto- 
lites,’ as tliey are sometimes called, is in Europe and America 
characteristic of the Upper Arenig, when the complexly 
branched foi-ms, and the peculiar Phyllograptus, have died 
out. With us their horizon is lower and their range very 
short. Phyllograptus, Clonograptus, and Dichograptus long 
