ILLUSTRATIONS XVll 



Kindle : Page 



Figure 9 — Plaster cast of ripple-mark formed by wave action 914 



" 10 — "Sand waves," or mammoth ripple-marks, Avon River, 



Nova Scotia 915 



Grabau : 



Figure 1 — West-end section of New York State 950 



" 2— Nortli-soutli section from Canada across New York and 



Maryland 950 



" 3 — Paleograpliic map of Tully time 955 



Grabau and O'Connell : 



Figure 1 — Diagram of tlie Birkbill delta, in southern Scotland 962 



(48 plates; 102 figures.) 



