NATURAL SCIENCES OF PHILADELPHIA. 439 



1 spec. '' N. allied to fiexuosa." Br. Ins. Coll. No. 126. 

 1 spec. " N. rotundifolia." Br. Ins. Coll. No. 127. 

 5 spec. N. ? Br. Ins. Coll. 



In these last, the specific name is not given, the naturalist, apparently, not 

 being able to decide as to them. 



Cyclopteris, Brong. 

 0. o b 1 i q u a, Brong. 



1 spec. " C. obliqua." Clay iron-stone. Br. Ins. Coll. No, 101. 

 ? 1 spec. " C. flabellata." Clay iron-stone. Br. Ins. Coll. No. 98. 

 ? 1 spec. " C. ? with N. cordata." R. E. Griffith. 



0. trichomanoides, Brong. 



1 spec. " C. trichomanoides." Clay iron-stone." Br. Ins. Coll. No. 99. 



C. camp ton eura, n. sp. 



Leaf petiolate, thin sub-cuneate, with margin apparently slightly lobate 

 and serrate; nerves thin, very flexuous, at base of leaf few in number (about 

 twelve), but rapidly and repeatedly forking, so that at margin they are very 

 numerous and close. 



The only specimen of this species which we have seen, has the nerves and 

 interior of the leaf, as well as its base, perfectly preserved ; but towards the 

 margin, it becomes so indistinct, that we speak with great doubt as to its 

 lobation and serration. The disposition and flexuosity of its nerves separate 

 it widely, however, from all heretofore known species. 



Habitat. England. Cab. of Acad. R. E. Griffith. 



C. dilatata, L. et H. 



1 spec. Clay iron-stone. Sheffield. T. B. Wilson, M. D. 

 1 spec. Clay iron-stone. England. T. B. Wilson, M. D. 



0. t r il o b u s, nobis. 



Sphmopteris dilatata, L. et H. Adianlites trilobiis, Goep. Cyclop, dilatata, 

 Sternb. 



As the specific name dilatata is pre-occupied, t r i 1 o b u s will have to be 

 retained. 



1 spec. Br. Ins. Coll. No. 16. 



1 spec. "Sphen. dilatata." Br. Ins. Coll. No. 85. 



NffiGERATHIA. 



N. flabellata, L. et H. 



1 spec. England. R. E. Griffith. 



Ord. SPHENOPTERID.E, Brong. 



Sphenopteris. 



S. artemesia folia, Brong. 



1 spec. England. R. E. Griffith. 



1 spec. "Sphen. artemesiafolia, N. cordata and P. polymorpha." Br. Ins. 

 Coll. No. 68. 



S. e 1 egan s, Br. 

 1 spec. Br. Ins. Coll. No. 84. 



1 spec. 



S. af fin i s, L. et H. 



2 spec. " S. affinis." Burdiehouse, Edinburg (Carbonif. limestone). Br. 

 . Ins. Coll. No. 87. 



S. lun ear i s, Br. 



1 spec. England. R. E. Griffith. 



I860.] 



