ILLUSTRATIONS 



15 



I'l.ATIC 



XX. 



XXI. 



XXII. 



XXIII. 



XXIV. 



XXV. 



XXVI. 



XXVII. 



XXVIII. 



XXIX. 



XXX. 



XXXI. 



XXXII. 

 XXXIII. 



XXXIV-XXXIX. 



XL. 



XLI. 



XLII. 



XLIII-LI. 



LII-LXV. 



LXVI. 



LXVII-LXXV. 



FACING PAGE 



Fig. 1. — View showing Barrier Beach and Recent Marsh, 



Parker Creek, Calvert County 124 



Fig. 2. — View looking up Parker Creek from Barrier 



Beach 124 



Fig. 1. — View showing Calvert Cliffs on Chesapeake Bay. 128 

 Fig. 2. — View showing Valley Truncated by Wave 

 Erosion, iy 2 mile south of Point of Rocks, Calvert 



County 128 



Fig. 1. — View showing Recent Scarp cut against Talbot 

 and Cretaceous Deposits by the waves of Chesapeake 



Bay, Betterton, Kent County 136 



Fig. 2. — View showing Inter-Talbot Scarp, near Spence, 



Worcester County 136 



Map showing Distribution of Lafayette Stations 292 



Map showing Distribution of Sunderland Stations 292 



Map showing Distribution of Wicomico Stations 292 



Map showing Distribution of Talbot Stations 292 



Map showing Hypothetical Position of Shore Line of 

 Lafayette Sea 292 



Map showing Approximate Position of Shore Line of 

 Sunderland Sea 292 



Map showing Approximate Position of Shore Line of 

 Wicomico Sea 292 



Map showing Approximate Position of Shore Line of 

 Talbot Sea 292 



Map showing Approximate Position of Shore Line during 

 the Post-Talbot Uplift, together with the Drainage of 

 the Region in the Vicinity of Chesapeake and Delaware 

 Bays 292 



Map of North America showing the Distribution of North 



American Species of Elephants 148 



Fig. 1. — Mammoth Engraved on Fragment of Tusk by 



Paleolithic man (X % ) 152 



Fig. 2. — Excavation of Mammoth Remains, after Paint- 

 ing by Chas. Wilson Peale 152 



Mammalia 240-245 



Mammalia, Reptilia, and Arthropoda 246 



Arthropoda — Crustacea 247 



Arthropoda and Mollusca 248 



Mollusca — Gastropoda 249-257 



Mollusca — Pelecypoda 258-271 



Coelenterata and Protozoa 272 



Plantae 273-281 



