38 W. M. Fontaine— Mesozoic Strata of Virginia. 
fact is, that when both of these plants occur at a locality, they — 
are so closely associated that they are confined to the same — 
layer, from which they seem to exclude nearly all other species. — 
imper also refers to the Oolite of the Richmond coal field, 
another plant often found associated with these two, viz: Neu-_ 
ropterts linneifola Bunb. . 
The Macroteniopteris is allied more closely to the Oolitic — 
Macroteniopterids of England and India, than to any older 
plants. The nearest to it, among older plants, is the Zenwp- 
teris gigantea Schenk, of the Rhetic. Nothing like it exists in — 
which is a characteristic Rheetic plant, as given by Schenk. 
e Ferns are either similar to Rhetic forms, or have aa — 
affinity with still later ones. I have fine specimens of a splem 
did Fern, which is allied to Cyclopteris pachyrachis Goepp, — 
though it is a smaller plant, and isa new species. From ifs © 
association with Neuropleris linnevfolia Bunb., and the resem: 
blance of the two, I think that it is the male form of Bunbury’s 
plant. They are both allied to Acrostichites Gaeppertianus Schenk, - 
which is a Rhetie plant. I have also specimens of a fine Fern, 
closely allied to, if not identical with, Asplenites Rissert: Schenk, — 
which is a characteristic plant of the Rhewtic. Others might be 
mentioned, which show either Rheetic or Liassic, and even Ooliti¢ _ 
affinities. { have not seen in this field a single Triassic plant 
In the revised edition of Dana’s Manual, Pecopteris Rein q 
teris) Stuttgartensis Brongt., is given as occurring in this field — 
This statement is probably based on the identification by Heer, | 
of this _ with Bunbury’s Pecopteris bullatu. I have seed 
* By this I do not mean that the beds containing this flora are the o 
the Mesozoic strata in Virginia. The lowest strata of the interior 
