166 N. S. SHALER— EVIDENCES AS TO CHANGE OF SEALEVEL. 



value, they seem to me to raise the presumption that along a large part 

 of continental coasts the average movement in relatively modern times 

 has been of a nature to bring the coasts inwardly toward the centers of 

 the continents. This may possibly be due to movements of the land- 

 masses themselves, but it appears to me more likely that we should recur 

 to the hypothesis of Strabo, briefly set forth in the opening paragraph of 

 this paper, and account for them, at least in part, by alterations in the 

 depth of the ocean floors. 



