DESCRIPTION OF TOE SPECIES. 173 



The base of tliis leaf was not seen, and tlie nerves towards tlie tip 

 were too obscure to be made out. The plant may be Nageiopsis or T'ddo- 

 zamitvs, but the flexuous character of the leaf indicates that it is a Zamitcs, 

 and here I place it provisionally. 



Zamites ovalis, sp. nov. 



Plate LXXXV. Fig. 4; Plate CLXX, Fig. 3. 



Leaves short, oval, acute, a])ruptly rounded olf at base, and showing, 

 when detached, a heart-shaped sinus, almost as broad at base as elsewhere; 

 nerves not seen. 



Localities: Banks of Dutch Gap Canal; ii.shing-hut above the canal; 

 road-side near Potomac Run ; near Telegraph Station ; rare. 



This plant can be placed among the Zamites only with doubt. 



Zamites subfalcatus, sp. nov. 



Plnte I.XXXIV, Fig. 1:5; Plate LXXXV, Fig. :S. 



Leaves long, proportionally narrow, subfalcate, acute, w'idest near the 

 base, abruptly rounded off at base, attachment not seen ; nerves not seen. 



Locality : Kankey's ; very rare. 



This is another of the doubtful species of Zamites. The epidermis 

 was so thick that the nerves could not be made out. Only a slight 

 striation can be seen. The plant specimen given in PI. LXXXIV, Fig. 13, 

 seems to be a tip of a leaf whose base is probably the specimen figured in 

 PI. LXXXV, Fig. 3. The amount of material obtained from Kankey's 

 place is so small and the impressions are so poorly preserved, that the 

 number of specimens of any given plant obtained there can not be taken 

 as indicating its actual abundance or scarcity. 



Zamites, sp. ? 



Plate LXXXIV, Fig. Pi. 



A single fragment of a thick leaf was found at Kankey's place. The 

 nerves were not seen. It is a{)parently a portion of a leaf of Zamites too 

 imperfectly preserved to permit the species to be determined. 



