DESCRIPTION OP THE SPECIES. 275 



Undetermined plant (c). 



Plato CXXXVII, Fig. 1. 



This singular fossil comes from Fredericksburg in only one specimen. 

 The main stem seems to have been rather succulent. It has attached lat- 

 erally towards the top a number of flat leathery appendages that seem to 

 have had a slight woody axis or midnerve. The}' remind one of the rib- 

 bon-like subtcirranean leaves of Stigtnaria. The fossil is apparently a root. 



Undetkkminkd plant {d). 



Phito CXXXVII, Figs. 9, 3. 



This fossil appears in the form of large main stems, that are strongly 

 striated and send off irregularly large striated branches. They seem to 

 have been somewhat succulent in cliaracter, and probably were roots. 



Locality: The plant occurs rarely at Fredericksburg. 



Undeteemined plant (e). 



Plate CXXXVII, Fig. 4. 



This fossil, found in only one specimen at Fredericksburg, is very 

 imperfect. It shows the curious feature of having a number of stems 

 radiating from the same zone on a common stem. The bases only of these 

 are preserved. They appear swollen and even bulbous, and are marked 

 by transverse striaj. They look something like the singular stems found at 

 Baltimore, and figuied on PI. CLIX, Figs. 4, 5. 



Undetermined plant (/). 



Plate CXXXVII, Fig. 5. 



mis is a woody branching stem, found in only one specimen at Fred- 

 ericksburg. It is without significant character, being decorticated. It may 

 belong to Athrotaxopais. 



Undetermined plant {(j). 



Plato CLXIX, Figs. 4, ."i. 



The specimens of this plant show very long and slender cylindrical 

 stems, with a comparatively small woody axis, surrounded by a succulent 



