EXPLANATION OF PLATES. 



From the "Outline of Cii|>i' Cod," by W. M. Davis, in Am. Acad. Arts and Sci., 



Proc, vol. 31. 



Fig. 1. Stages in the development of the outline of the north end of 



Cape Cod. 

 Fig. 2. Ideal section showing development of shore profiles on Cape 



Cod. 

 Fig. 3. Map of stages in the gradation of an irregular shore-line, like 



that which Cape Cod formerly possessed. 



