New Species of Fossil Plants. 417 



ing or diverging lobes ; nerves very thin, flabellate or dicho- 

 tomous from the base, very close and slender near the margin ; 

 surface more or less covered with short straight hairs. 



Genus NEUROPTERIS. 



19. Neuropteris speciosa (spec. nov.). Leaves oval, 

 lanceolate, cordate at the base, 3 to 6 inches long, li to 2 

 inches broad ; margins entire, nervules flabelliform, and dicho- 

 tomous from a scarcely inflated medial nerve ; distant, very 

 slender and distinct ; very arched downwards, and then 

 turned upwards on the margins. 



20. Neuropteris hirsuta Lesqx. Neuropteris cordata 

 Brongt. Neuropteris angustifolia Brongt. Neuropteris 

 Scheuchzeri HofT. Neuropteris acutifolia Brongt? Frond 

 pinnate or bipinnate ; pinnules trifoliate except near the 

 summit of the pinnse, where they become simple ; leaves 

 cordate at the base, lanceolate, acute, or obtuse ; sometimes 

 irregularly lobed, strongly nerved, till above the middle ; 

 nervules dichotomous, very arched and close ; leaflets of the 

 base kidney shaped, round, oval, much smaller, with the 

 nerves flabelliform from the base, without any medial nerve ; 

 surface of the leaves more or less covered with short straight 

 hairs. 



21. Neuropteris Clarksoni (spec. nov.). Stems irregu- 

 larly bipinnately branching ; pinnules simple, broadly lanceo- 

 late above ; cordate or irregularly auriculate, and hastate at 

 the base by the inferior lobe being more or less elongated ; 

 terminal pinnule lance shaped, equally bilobed in the middle ; 

 nervules dichotomous, distinct, strongly marked from a thick 

 medial nerve, which ascends nearly to the summit. 



22. Neuropteris fissa (spec. nov.). Frond? Pinnule 

 oval, truncate at the base or cordate ; margin undulate ; 

 nervules dichotomous from a medial nerve ; very distant and 

 slender, scarcely marked. 



23. Neuropteris delicatula (spec. nov.). Frond bipin- 



JOURNAL B. S. N. H. 54 AUGUST, 1854. 



