104 THE OLDER MESOZOIC FLORA OF VIRGINIA. 



suggests the idea that the plant is not Macrotozniopteris (Tamiopteris) 

 magnifolia, but rather a large Nilssonia or a Pterozamites like Pterozamites 

 Blasii, Schimp., Pteropliyllum Blasii, Schenk. I omit. Emmons's figure, as it 

 does not show anything definite. 



Emmons gives in fig. 69, a frond which in outline exactly resembles 

 the reduced form of Macrotozniopteris magnifolia given by Rogers in the 

 "Trans, of the Am. Ass. of Geol.," &c, but the nervation is very different 

 from that of Macrotceniopteris magnifolia. He says nothing about the figure, 

 and hence I am at a loss to know its meaning. If it represents a plant 

 found in the North Carolina Mesozoic, it is a new species. Locality not 

 given. 



Neuropteris. spec ? 



Plate XLIX, Fig. 2. 

 Emmons's "Am. Geol.", fig. 71, p. 102. 



" Frond large, bipinnate, secondary, as well as main rachis, thick and strong; 

 leaflets obtuse, oblong, contiguous or adhesive by the whole base. This fern occurs 

 at Ellington's. It is a very large plant, with a strong rachis. The side veins numer- 

 ous, forked once or twice; it has no midrib towards the apex, or it vanishes about 

 one-third its distance from the point." 



This plant, I think, can hardly be separated from Asterocarpus platyraclm 



of the Virginia Mesozoic. It corresponds to the sterile form. 



Neuropteris linnseasfolia. Banbury, p. 104. 



Emmons merely copies a part of Bunbury's figure, and does not say 

 that the plant occurs in the North Carolina Mesozoic, though it is to be 

 presumed that it does. 



Cyclopteris obscurus. 

 Plate XLIX, Fig. 5. 

 Emmons's "Am. Geol.", plate 4, fig. 10, p. 104. 



"Frond suborbicular, sessile, veins numerous, three or four times divided, flexuous 

 and radiate from the base. This Cyclopteris is imperfect, but there can be no doubt 

 of its belonging to this genus. There are round dots like sori between the veins, but 

 obscure, it may be by age. It occurs sparingly at Ellington's, and a smaller but dif- 

 ferent species occurs also at Lockville." 



This plant is clearly a Sagenopteris. The figure represents two leaflets, 

 partly preserved; the fragment on the left partly overlaps that on the right. 

 It is much like the plant from the Richmond Coal Field, and there can be 

 hardly a doubt that both are the very polymorphous Rhpetic form Sagenop- 

 teris rhoifolia. 



