New Species of Fossil Plants. 425 



above the leaflets ; medial nerve strong at the base ; nervules 

 once forking. 



Genus CREMATOPTERIS. W. P. Schimper. 



64. Crematopteris ? pennsylvanica (spec. nov.). Rachis 

 very thick, round, near'y smooth, or irregularly striate ; pin- 

 nules short, linear oval, distant, sessile on the broad rachis, 

 slightly attenuated at the base ; nerves entirely obsolete or 

 none. 



Genus SCOLOPENDRITES. Lesqx. 



Frond simple, lanceolate, large, deeply, irregularly toothed ; 

 medial nerves very slender ; nervules thin, pinnately branch- 

 ing from the medial nerve, nearly straight and scarcely arched, 

 undulate, very distant, one eighth of an inch and more, fork- 

 ing twice. 



65. Scolopendrites grosse-dentata (spec. nov.). Spe- 

 cific characters the same as above. 



Genus CAULOPTERIS. Lindl. and Hutt. 



66. Caulopteris punctata (spec. nov.). Scars oval ob- 

 tuse, about two inches long, distant, with a broad smooth 

 margin ; fascicle of vessels simple, oval, curved above in two 

 converging horns ; intervals between the scars dotted with 

 the base of small rootlets ? 



67. Caulopteris gigantea (spec. nov.). Differs from 

 the former by the large size of the scars, its entirely smooth 

 surface, and the divergence of the horns. 



Genus STIGMARIA. 



68. Stigmaria cost ata (spec. nov.). Like Stigmaria ana- 

 bathra ; differs by the nearly regular, strong and elevated ribs 

 which separate the rows of scars placed in a regular, nearly 

 spiral order. 



JOURNAL B. S. N. H. 55 AUGUST, 1854. 



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