GEOLOGICAL LITERATURE OF THE VIRGINIA COASTAL PLAIN. 45 



The epidermal characters of Freiielopsis ramosissiina. 



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, 190S, pp. 655-059. 

 Abstr. Science, N. S. vol. xxix, p. 629. 1909. 



Clark, Wm. Bullock. Results of a recent investigation of the coastal 

 plain formations in the area between Massachusetts and Xorth Carolina. 

 Bull. Geol. Soc. Amer., vol. xx, 1910. pp. 646-654. 

 Abstr. Science, N. S. vol. xxix. p. 629, 1909. 



Miller, Benjamin L. Erosion Intervals in the Tertiary of North 

 Carolina and Virginia. 



Bull. Geol. Soc. Amer., vol. xx, pp. 673-678. 



1911 



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

 eastern North America. 



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



. A revision of several genera of gymnosperuious 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 from the Potomac Group which 



have been referred to th^ genera Cladophlebis and Thyrsopteris. 

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



Besides the above named articles there are many brief references to the 

 economic resources of the Virginia Coastal Plain in the statistical publica- 

 tions of the U. S. Geological Survey and in the special reports of the U. S. 

 Census Office. 



