GRAPTOLITES OF AUSTRALIA 
35 
the forms were examined and identified by T. S. Hall. Hart 
divided the area into three parts, a western area, west of the 
line of strike passing through the Ajax Mine, wliich belongs 
to the Bendigo Series; a central belt, with Bendigo beds on 
its west side and the Wattle Gully series farther east ; and his 
eastern localities east of the Ballarat railway near Woodburn 
and eastwards from the Springs at Hepburn, all of which are 
referable to parts of tlie Castlemaine Series above the AVattle 
Gully beds. 
From the western area he fixed a number of localities more 
or less precisely and refers to them by numerals from 1 to 13. 
From them he recorded Tetragraptus fruticosns, T. hryo- 
noides, T. pendens, T. quadribrnchiatus, Didymograptus 
bifidus, D. cf. murchisoni, Goniograptiis thureaui, G. macer 
and Phyllograptus typns. In the central area, he numbered 
his localities 14 to 43. He recorded from them Didymo- 
graptus bifidus, D. extensus, D. cf. nicholsoni, D. caduceus, 
Tetragrapius bryonoides, T. serra, T. quadribracJiiatiis, T. 
fruticosus, Clonograptus abnormis, C. fiexilis (?), Fhyllo- 
graptus typus and Dendrograpfus sp. ( ?). From the eastern 
localities numbered, 44 to 54, he recorded Didymograptus 
caduceus (large), D. nitidus, Dichograptus octobrachiatus, 
Tetragrapius quadribrachiatus, Phyllograptus typus and P. 
angustifolius. 
In regard to these faunas he points out that there is — 
1. A series of beds in which Didymograptus caduceus is 
abundant and sometimes large, associated with Phyllo- 
graptus angustifolius and Didymograptus nitidus, 
neither of which he found in other beds, and Tetra- 
graptus quadribrachiatus, which also appears in other 
l3eds. 
2. A series characterized by the extreme abundance of 
Didymograptus bifidus. 
3. Beds with Phyllograptus typus, Tetragraptus fruti- 
cosus, and T. bryonoides. 
In these beds Didymograptus bifidus is seldom present and 
never common. Tetragraptus fruticosus is never observed 
in beds in which D. bifidus is common. 
4. At one locality with Phyllograptus typus and Tetra- 
graptus bryonoides, Clonograptus was conspicuous, but 
neither Tetragraptus f ruticosus, Didymograptus bifidus 
nor D. caduceus was noticed there. 
This may be summarized as follows : 
3rd, beds with abundant Didymograptus caduceus, newer 
than 
