14 Transactions. 
workers from attempting careful zonal collecting and investigation of faunas, 
more fully to test the possibility of detailed interpretations of the Australian 
geological record. Such recent work as has been done seems full of promise. 
Walcott’s (1916) comparison of the Lower Cambrian fauna of Australia 
with that of eastern Asia, and Keble’s (1920) elaboration of Hall’s grapto- 
lite zoning of the Lower Ordovician, are cases in point. Ruedemann 
(1904) has indicated that the zonal sequence of the graptolite fauna of 
New York in so far as it departs from that established in Europe approxi- 
such as they stand at present, in regard to the Devonian period are 
at least strongly suggestive of many interesting conclusions. The need 
for the compound term “ Siluro-Devonian ” has vanished. So, too, the 
term “ Permo-Carboniferous " is gradually succumbing to the detailed 
inquiries of Professor David and his associates; while the term “ Trias- 
Jura " has been robbed of the significance Hall attached to it (as indicating 
a real admixture of forms) by the important work of Trechmann and 
the most significant publication of 
which have shown that when the fossils 
lations may be mad 
the Cretaceo-Tertiary hypothesis seems to have 
the work of Woods 
some periods, and the correlation of 
i p ra-Australasian strata, is still very 
difficult in the Upper Ordovician rocks, the “ P d 
е т objects formed b 
ament ri times. Let me urge my countrymen to continue 
the geologists of other countri trata, lest they be left behind by 
is apparent, and who are é es to whom the necessity of this kind of study 
рія carrying it on with great success ” (Marr, 1896). 
present paper the writer, wh t 
palacontologioal knowledge, has considered мечу the Dee abeo 
stands, without attempting to revise the q 
content to consider position = the would-be antiquary who was 
ata or to discuss pros and cons, 
А ; 
Me STOPES, Science Progress, vol. 14, p. 347, 1919, 
