350 



FILICALES 



[CH. 



Ruffordia Goepperti (Dunk.). Fig. 260. 



This Wealden fern^ has been doubtfully assigned to the 

 Schizaeaceae on the ground of the resemblance of the sterile 

 fronds to those of some species of Aneimia, and because of the 

 difference between the sterile and fertile pinnae (Fig. 260). 

 Ruffordia cannot be regarded as a well authenticated member 

 of the Schizaeaceae. 



Fig. 261. A, A'. Chrysodium lanzaeanum. 



B, B'. Lygudium Kaulfussi. 



C. Marattia Hookeri. 



(After Gardner and Ettingshauaen ; A, B, | nat. size.) 



Lygodium Kaulfussi, Heer. Fig. 261, B, B'. 



Fragments of forked pinnules, agreeing very closely in vena- 

 tion and general appearance with recent species of Lygodium, 

 have been identified by Gardner and Ettingshausen ^ from 

 English Eocene beds and by Knowlton from the Miocene beds of 

 the Yellowstone Park^ as Lygodium Kaulfussi Heer (fig. 261, B). 

 Despite the absence of sporangia it is probable that these 



1 Seward (942) a. p. 75. 



2 Gardner and Ettingshausen (82) p. 47, PI?, vii. x. ; Heer (55) A. PI. iii. p. 41. 



3 Knowlton (99). PI. Lxxx. 



