FROM A DREDGING IN THE WEDDELL SEA. 
709 
The drift in both cases has apparently been more or less northwards, but it is 
impossible to assign any southern limit to the localities from which they may 
severally have been drifted. All one can say is that somewhere in Antarctica there 
must have been a development during Cambrian times of limestone containing 
Archseocyathinse and marine algse. 
A much more useful comparison, however, may be made with the Cambrian 
fauna of South Australia. As described by Taylor, it constitutes the most complete 
and most extensive Archdeocyathus fauna yet recorded. 
