318 BULLETIN 120, UNITED STATES NATIONAL MUSEUM. 



since it argues slightly against the existence of a Cretaceous, trans- 

 Pacific connection between Australasia and South America (fig. 234). 

 Such scant negative data, however, deserves, of course, little weight, i 



Members of this group apparently did not pass eastward during 

 the Tertiary from Australia to Patagonia by way of Antarctica (tig. 

 236), But this bit of negative evidence has by itself but little in- 

 terest. There are, however, other indications that spreading by this 

 route was more westward than eastward. 



