56 The Lower Ceetaceous Deposits op. Maryland 



1910 



Berry, Edward W. A Eevision of the Fossil Plants of the genera 

 Acrostichopteris, Tasniopteris, Nilsonia, and Sapindopsis from the Po- 

 tomac Group. 



Proc. U. S. Natl. Mus., vol. xxxviii, 1910, pp. 625-644. 



. A Eevision of the 'Fossil Plants of the genus Nageiopsis of 



Fontaine. 



Proc. U. S. Natl. Mus., vol. xxxviii, 1910, pp. 185-195, tf. 1, 2. 



. The epidermal characters of Frenelopsis ramosissima. 



Bot. Gazette, vol. 1, 1910, pp. 305-309, tf. 1, 2. 



. Geologic relations of the Cretaceous Floras of Virginia and 



North Carolina. 



Bull. Geol. Soc. Amer., vol. xx, 1910, pp. 655-659. 



Clark, Wm. Bullock. Eesults of a recent investigation of the 

 coastal plain formations in the area between Massachusetts and 

 North Carolina. 



Bull. Geol. Soc. Amer., vol. xx, 1908, pp. 646-654. 



1911 

 Berry, Edward W. A Lower Cretaceous species of Schizaacese from 

 eastern North America. 



Annals of Botany, vol. xxv, 1911, pp. 193-198, tf. 1, pi. xii. 



. A revision of several genera of gymnospermous plants from 



the Potomac Group in Maryland and Virginia. 

 Proc. U. S. Natl. Mus., vol. xl, 1911, pp. 289-318. 



. A revision of the fossil ferns fro;n the Potomac Group which 



have been referred to the genera Cladophlebis and Thyrsopteris. 

 Proc. U. S. Natl. Mus., vol. xli, 1911, pp. 307-332. 



STEATIGEAPHIC AND PALEONTOLOGIC CHAEACTEEISTICS 

 The Lower Cretaceous deposits of Maryland and adjacent areas have 

 long been studied by many independent workers who have approached 

 the problem from nearly as many different points of view. This fact, 

 together with the proverbially complicated stratigraphy, has given rise 

 to a highly varied taxonomy which is set forth in the pre^dous chapter 

 and the accompanying comparative taxonomic table. 



