CONTENTS. i 



Part III. The Cretaceous flora— Continued. Page. 



Flora of the Older Potomac formation— Continued. 



Recent collections of fossil plants from the Older Potomac of Virginia and Maryland— Cont'd. 

 Report on various collections of fossil plants from the Older Potomac, etc.— Continued. 

 Localities in the District of Columbia— Continued. 



Fossil plants from the new reservoir 516 



Fossil plants from Terra Cotta 519 



Fossil plants from Ivy City 519 



Fossil plants from Langdon 519 



General remarks 525 



Fossil plants from the Queens Chapel road 527 



Localities in Maryland 



Fossil plants from Hosiers Bluff •'-' 



Fossil plants from Riverdale 533 



Fossil plants from near Berwyn '. ^"^"^ 



Fossil plants from the Bewley estate 534 



Fossil plants from Muirkirk ^34 



Fossil plants from Contee 537 



Fossil plants from Arlington 537 



Age of the Arlington beds 542 



Fossil plants from Hanover 543 



Fossil plants from the Howard Brown estate 544 



Fossil plants from Reynolds's ore pit 544 



Fossil plants from German's iron mine 545 



Fossil plants from Hobbs's iron mine 545 



Fossil plants from Tiptop - - 545 



Fossil plants from Vinegar Hill 547 



Fosgil plants from Soper Hall 554 



Fossil plants from Lansdowne 556 



Fossil plants from Federal Hill 556 



Age of the Federal Hill beds 566 



Fossil plants from Union tunnel 570 



Fossil plants from Springfield 571 



Fossil plants from Stemmers Run 571 



Fossil plants from Broad Creek 572 



Fossil plants from Plum Creek. 572 



Fossil plants from Muddy Creek - 572 



Fossil plants from Locust or Poplar Point ^I'i 



Fossil plants from Grays Hill 573 



General remarks and conclusions - ^'* 



Correlation of the Potomac formation in Virginia and Maryland 5S0 



Table of distribution of Potomac plants 582-589 



Analysis of the table 590 



Columnar section of the Potomac formation 597-598 



Index 601 



