GRAPTOLITES OF AUSTRALIA 
25 
graptus fniticosus to D. v-fractus (9). All other species 
mentioned by T. S. Hall were previously recorded by McCoy. 
After commenting on the associations at Bendigo, Dayles- 
ford, Lancefield, Gisborne, Barriwil and New Zealand, he 
proposed the following zoning, the beds being arranged in 
descending order: 
1. Zone of Loganograptus Jogani occurring at Castlemaine 
and Darriwil. 
2. Zone of Tet rag rapt us caduceus occurring at Castle- 
maine. 
3. PhgJlograpfo-caduceus zone occurring at Castlemaine. 
4. Burns’ Reef Beds occurring at Castlemaine. 
5. Wattle Gully Beds occurring at Castlemaine and ( 1) in 
New Zealand. 
6. Zone of Tetragraptus fniticosus occurring at Chewton, 
Bendigo, Spring Plains, Tarilta, Upper Loddon, 
Daylesford, Gisborne and to the north-west of Lance- 
field. 
7. The Lancefield shales. 
Hall called No. 1 the Barriwil Zone. It rests immediately 
above 2, 3, 4, and 5, which together form the Castlemaine 
Zone ; and this, in turn, rests on the Bendigo Zone, which Hall 
defined as the strata containing Tetragraptus fniticosus. All 
strata below the Bendigo Zone containing graptolitcs were 
called by Hall the Lancefield Zone. He was more or less hazy 
as to what constituted his Barriwil and Lancefield Zones. 
1896. — T. S. Hall (29) commented on the synonymy of 
Salter’s Didgmograptiis caduceus, described from a Can- 
adian specimen, and regarded Salter’s species as valid. He 
])ointed out that Nicholson (after following J. Hall, who 
made Salter’s D. caduceus synonymous with Tetragraptus 
higshyii) “found a species in the Skiddaw Slates which 
seemed to agree perfectly with Salter’s Canadian species. 
This species he named Didgniograptus gihberulus” stating 
that “Salter’s original specimen,” (although he had not seen 
it) “was beyond doubt an example of Tetragraptus hryon- 
oides or T. higshyi, and that Salter had confused an English 
species with it.” T. S. Hall pointed out the improbability of 
this and contended that “P. gibherulus must be relegated to 
synonymv, for it does not seem separable from I). caduceus.” 
' 1897,_IT. S. Hall (30) recorded froin Wombat Creek, 
North-eastern Victoria, CUmacograptus bicornis and Dicel- 
lorjraptus elegans; from Tungamah, (?) Dicellograptus 
sextans, (‘t) Dicranograptus ramosus and Diplograptus 
pristis; from Walwa (Walwal) Creek, Dicellograptus 
