24 
GRAPTOLITES OF AUSTRALIA 
1887. — E. A. F. Murray (22) listed the identifications 
hitherto made by McCoy. He also recorded from Deddick* 
Diplograpsus rectangularis McCoy, and from Guttamurrh 
Creek, Snowy Eiver, Didymograpsus caduceus and Diplo- 
grapsus foliaceus “in vertical slates capping the granite.” 
The First Period of Research might aptly be called 
McCoy’s Period, for on his identifications was based all that 
was adduced in connection with Australian graptolites. The 
fauna was correlated with the European and American which, 
at that time, was still imperfectly known. No attempt was 
made to discover an Australian stratigraphical sequence. 
Second Period: 1892-1932. 
Early in the Second Period, T. S. Hall (25) suggested a 
basis for zoning the Australian fauna and subsequently 
developed it (28 and 64). W. J. Harris and R. A. Keble (81, 
121) working on Hall’s zones, defined them and showed that 
they were capable of much closer subdivision. 
1892. — G. B. Pritchard (23) described and figured Temno- 
graptus magnificus sp. nov. from Lancefield (cf. 39). T. S. 
Hall (24) described and figured Dictyonema grande sp. nov. 
(cf. 31). 
1893. — T. S. Hall (25) suggested a basis for zoning the 
Victorian Lower Ordo\dcian and named some of the zonal 
graptolites that could be used, among which were Tetra- 
graptus fruticosus, Didymograptiis caduceus, D. bifidus, 
Phyllograptus typus and Loganograptus logani. 
1895. — G. B. Pritchard (27) added to his description (23) 
of Temnograptus magnificus and T. S. Hall’s species Dictyo- 
nema grande (24). He compared Victorian forms of Clono- 
graptus ficxiUs with J. Hall’s original description. He also 
recorded Tetragraptus quad rib rachiatus from Lancefield. 
T. S. Hall (28) instituted a system of zoning for the Castle- 
maine area which was incidentally to become the basis for 
the Lower Ordovician of Victoria. The Castlemaine area is 
suited to such a purpose as the railway cuttings and water 
races are generally at right angles to the strike and sections 
are exposed over long distances. He referred to Didymo- 
graptus caduceus as Tetragraptus caduceus, an anomaly that 
he says (cf. 29) was forced on him by the confused synonymy 
of Didymograptus caduceus. He also listed the hitherto 
unrecorded Thamnograptus sp. and Dicliograptus kfierulfi. 
He commented on the similarity of some forms of Tetra- 
*If a locality is in any other State than Victoria, the particular State is always 
mentioned. 
