COERELATION OF EARLY f'RETACEOUS FLORAS. 



8S 



byensis of the English Oolite may be cousidered as the typical form, which is represented 

 by différent species, sub-species and varieties in the Jurassic and Lower Cretaceous of 

 nearly every part of the world. 



This beautiful species, so common in the Anthracite shale, and which is better preserved 

 than any other fern in the collection, is without doubt that named by Fontaine C. fulcata, 

 though I am by no means certain that this is distinct more than varietally from some of 

 his other species and some of those figured by Heer. It is certainly distinct in venation 

 from C. Whitbyensis, though closely resembling some varieties of that species in form. It 

 is near to Pecopteris recentior and P. ligata of Phillips, and also to Aspleninm Alberium from 

 Mill Creek and A. distans from Caumore, described in my former paper. 



Cladophlebis (Sp.) 



This is a small fragment with delicate pinnules, somewhat resembling those of Fon- 

 taine's C. inclinata, but probably distinct. It is from Anthracite. 



Aspidium Fredericksburgense (Fontaine.) (Fig. 5.) 



Fig. 5. — A^idium Fredericksburgense. 



In referring certain specimens from anthracite to this species, I do so with the reser- 

 vations stated below. My specimens, in so far as the fronds are concerned (and they do 

 not show fructification) might be referred equally to Fontaine's species or to the Pecopteris 

 Whitbyensis mentioned under the last head. In texture and venation however, they differ 

 from Cladophlebis Jalcala and are probably generically distinct. The only difierence 

 observable as compared with Pecopteris Whitbyensis is that the nerves fork a little farther 

 from the midrib. From Fontaine's figures our specimens differ in the nerves forking only 



