54 PP. REPORT OF PROGRESS. FONTAINE & WHITE. 



burg Coal at Cassville, W. Va., also found abundantly 500 

 I'eet above this horizon in Greene Co. Pennsylvania. 



OdontoiDteris densifoUa^ Sp. nov., PL X, Fig. 3. 



Frond, pinnate, or bipinnate ; pinnules, ovate, inclined 

 forward, densely jjlaced, touching by their borders so as to 

 appear imbricated, nerves, going off from the entire base ; 

 at the center a bundle of nerves issues, which is quickly dis- 

 solved into branches, all exceedingly fine but distinct, dich- 

 otomosing again and again so as to fill in a fiabellate man- 

 ner the end of the pinnules. 



The issuing of the bundle of nerves at the middle of the 

 base of the pinnule gives the appearance of a short mid- 

 nerve. 



The leaf substance is very dense and thick. 



Habitat — Roof shales of the Waynesburg Coal, Cassville, 

 West Virginia. 



Callipteris, Brongt. 



Callipteris conferta, (Sternl).. ) Brongt, PI. XI, Figs. 1-4. 



The plant which w^e have identified with Callipteris con- 

 ferta, is found in consideral)le quantities, covering the sur- 

 face of a calcareous iron ore which occurs in the roof of 

 the Washington Coal, 175 feet above the base of the Up- 

 per Barren Measures, near Brown's Bridge, Monongalia 

 Co., W. Va. It is associated with Splienopteris coriacea, 

 F. & W., and these two plants form almost the entire flora 

 at the place mentioned. We find there all the forms of C. 

 conferta that have been figured by Weiss in his " Foss. Fl. 

 d. Jiinst. Steink. u. Roth." except the fruiting form wdiich 

 he gives. The plant, as we find it, is very thick and leather- 

 like. There seems to have been a fleshy epidermis extend- 

 ing over the rachis in the upper portions of the plant, 

 which caused this to appear much wider than it really is, 

 as is shown in Fig. 4a, which represents an enlarged portion 

 of Fig. 4. The lower part gives the appearance of the pinna 

 when the thick epidermis is removed, and the upper part 



