282 ANNUAL REPORT SMITHSONIAN INSTITUTION, 192 8 



masses toward the close of this era through their combined effect 

 sounded the prophecy of doom for large parts of the sialsphere, since 

 some land-bridges and most borderlands throughout the Mesozoic 

 eia were being absorbed by the periodically heated basaltic shell or 

 simasphere. Cenozoic time completed what was begun during Car- 

 boniferous time. 



The writer's long training in historical geology and his close study 

 of Suess' Antlitz der Erde make it easy for him, after reading Daly's 

 book, to throw the above new dress over the displacement theory, 

 but he still realizes its many difficulties and hears the warning of 

 Father Time that the rising generation will many times dress and 

 redress the features of our Mother Earth before geologists and 

 paleontologists will see her correctly in her evolving form. 



