191 i-l ATLANTIC AND GULF COASTAL PLAIN, 313 



Querciis Lchinanni Holl. 



Ulmus basicordata Holl. 



Cccsalpinia ovali folia Holl. 



Rhus Millcri Holl. 



Pieris scrobiciilata Holl. 



Phyllites sp., Holl. 

 In addition to the above the following have been described from 

 the same horizon at Richmond, Va., by Berry :^ 



Sol-L'iiiia foniwsa Heer? 



Taxodinni distichitiii iiiioccnu})i Heer. 



Salix Racaiia Heer. 



Carpiiiits graiidis Unger. 



Querciis calvcrtoncnsis Berry. 



Rhus Millcri Holl. 



Planera Uiigeri Ettings. 



Ficiis richiiioiidcnsis Berry. 



Plataiiits aceroides Goeppert. 



Podogoniiiui? virginianum Berry. 



Dalbcrgia calvcrtoncnsis Berry. 



Cclastriis Bruckinaiini Al. Br. 



Nyssa gracilis Berry. 



Fra.viiuis richniondcnsis Berry. 

 These plants indicate that the coast was low, which explains the 

 absence of any but the finest terrigenous materials in the shallow 

 water deposits which constitute the Calvert formation. The flora 

 from \'irginia indicates the presence of extensive cypress swamps, 

 the latter type of plant being the most abundant fossil collected and 

 the other plants identified being for the most part similar in their 

 physiological demands upon their environment. The flora from 

 Maryland is the natural counterpart of that from Virginia in con- 

 taining several typical elements of just the sort of a plant associa- 

 tion found on sands (inner beaches and more or less stationary 

 dunes) along the present coasts in the temperate zone. 



Regarding age the plants are clearly Middle Miocene according 

 to European standards. They indicate less conclusively the climatic 

 ^ Berry, Jouni. Gcol, Vol. 17, 1909. pp. 19-30, tf. i-ii. 



