DESCKIPTIOX OF THE SPECIES. 115 



Angioptkkidujm dknsinerve, sp. nov. 



Plate XXIX, I'ig. 4. 



Only a small fragment of a pinnule seen; midnerve slender; lateral 

 nerves slender, closely placed, going- olf at an acute angle and maintaining 

 the same direction to the margin, nearly parallel, forked at the base or 

 above. 



Locality : Fredericksburg. 



Oidy one fragment was found, but this seems to indicate a well- 

 marked species. 



Angiopteridium pachyphyllum, sp. nov. 



Plate XXIX, Fig. 5. 



Frond unknown ; pinnules apparently long and proportionally quite 

 narrow ; midrib stout and prominent ; leaf-substance thick, shining, and 

 leathery, hiding the lateral nerves on the upper side. 



Locality : Fredericksburg. 



Only a fragment of a pinnule was found, so that its length could not 

 be made out. The specimen probably presents the upper surface of the 

 leaf uppermost. 



Angiopteridium ovatum, sp. nov. 



Plate XXIX, I'igs. 6, 7. 



Frond unknown ; pinnules ovate, broad and rounded at base, truncate 

 and serrately toothed at the tip; maximum width, 30™"'; length, S"""; 

 midnerve stout ;it base and split up into branches at the summit; leaf- 

 substance membranaceous ; lateral nerves slender but very sharply defined, 

 remote, going off at an acute angle, arched backward near the base and 

 forward higher up, foi-ked near the base or above, branches slightly di- 

 verging, mostly simple, very rarely forked near the margin. 



Locality : Fredericksburg. 



This is a very rare plant, but a distinctly defined one. The two 

 specimens figured were so placed as to indicate that they belonged to the 

 same pinnule, Fig. 7, representing the tij), corresponding to Fig. 6. 



