66 
GRAPTOLITES OF AUSTRALIA 
and Slierrard are right in stating that they are the same bed, 
may be fixed by the graptolite bed, that is, they are Silurian, 
probably high Wenlockian.” Descriptions and figures were 
given of both Upper Ordovician and Silurian forms, includ- 
ing Eetiograptus yassensis, a new species. 
E. A. Ripper (151) published a paper on Didymograptus 
protoMjidus. After reviewing the Victorian pendent Eidy- 
mograpti, she gave a description of B. protobifidus Elies. 
She stated that T. S. Hall “referred under the name of D. 
hifidus (J. Hall) to some forms which undoubtedly belong 
to this more primitive species.” Transients are to be found 
in the Upper Bendigonian and Lower Castlemanian assem- 
blages and a number of localities where they occur are 
specified. 
She gave a comparative table of the specific characters and 
details of the evolutional changes of D. hifidus and D. proto- 
hifidus, also remarks on assemblages and correlations. 
“After a careful comparison of Victorian and British 
specimens,” she concluded, “the tuning-fork graptohte 
occurring most abundantly in the uppermost Bendigonian 
and Lower Castlemanian (B1 and C5) zones in Victoria is 
identified with Bidymograptus protobifidus Elies.” 
She supplied a table showing the proposed correlation of 
the Victorian and British Lower Ordovician graptolite suc- 
cession. 
G. E. K. Naylor (152) in a preliminaiy note on the occur- 
rence of Palaeozoic strata near Taralga, New South Wales, 
gave a map and sections of the district. In the basal sedi- 
ments he found “generically recognizable specimens of 
Biplograptiis, Climacograptus, Bicellograptus and Bicrano- 
graptus pointing unquestionably to the Upper Ordovician 
age of the beds.” 
Silurian beds occur in rather restricted lenticular bands 
folded in among the Ordovician strata. The two most promi- 
nent forms of graptolites occurring in them are Monograptus 
hohemicus and M. chimaera. 
D. E. Thomas (153) published notes on the Silurian rocks 
of the Heatheote area. He gave a classification to which he 
attached local names. In his Dargile Beds the lower beds 
are unfossiliferous and are sej3arated by some sandstone 
from the Graptolite Beds which also contain numerous shelly 
fossils. He divided the Graptolite Beds into : 
(a) The lowest beds with Monograptus uncinatus, var., M. colonus var. 
compactus and fossils other than graptolites. 
(b) These are succeeded by sandstones and mudstones and the former have 
