69 



carbonaceous mass is removed there is revealed a series of little 

 pits in the substance of the pinnule that represent the impress of 

 the sporangia. These pits are disposed in circles. 



The specimens which furnish the basis for this species have 

 been shown to Mr. Wm. R. Maxon, of the U. S. National Museum, 

 and he pronounces them as without doubt dryopteroid. This 



Fig. 2. Dryopteris Lloydii, fer- 

 tile pinnule, X 3- 



Fig. 3. Dryopteris Lloydii, fer- 

 tile pinnule, X 3. 



species has a more or less remote resemblance to several living 

 species, but so little is known of its whole form that it would be 

 perhaps misleading to signal any one for direct comparison. 



Among fossil forms the species here described is undoubtedly 

 very closely related to Aspidium fecundum Heer* (or Dryopteris 

 fecunda as it should now be called) from the Atane beds of Green- 

 land. The latter species, however, is considerably larger, with 

 the pinnae cut to the rachis into oblong, rounded pinnules. The 



* Heer, Oswald, Den ersten Theil der fossilen Flora Gronlands: Flora fossilis 

 arctica. Vol. 6, Pt. 2, 1882, p. 32, pi. xxix, figs. 5-9. 



