58 . THE OLDEE MESOZOIG FLORA OF VIRGINIA. 



radiating from one stem. This can hardly be anything but a Dictyophyllum 

 or Camptopteris. It cannot be Clathropteris platyphylla. 



In the same cabinet is another obscure specimen of Clathropteris from 

 the banks of the Connecticut River, in Montague, Mass. From this it 

 would appear that plants of the general character of Clathropteris are not 

 uncommon in the Mesozoic sandstones of the Connecticut Valley, and also 

 that some of them may be Dictyophyllum or Camptopteris. 



Professor Newberry gives a figure of a plant with twenty or more seg- 

 ments radiating from a common center on plate vii, figs. 2, 2 a, in Macomb's 

 "Report of the Exploring Expedition from Santa Fe\" It was obtained 

 from Los Bronces, Sonora, and is described under the name Camptopteris 

 Bemondi. It seems to be a true Camptopteris, and is very different from our 

 Virginia plant, while it may be very close to Hitchcock's plant showing 

 seventeen segments. The resemblance between the plant from the Con- 

 necticut River Mesozoic and the Virginia fossil is sufficiently close to sug- 

 gest that the horizon of both may be the same; but additional fossils from 

 the Connecticut River area of Mesozoic strata will be needed to entitle us 

 to draw any conclusions on this subject. 



Formation and locality. — Found only at Clover Hill, in sandstone, with 

 Lonchopteris, 'under the main coal and above the bottom seam. 



PSEUDODA1SLEOPSIS, gen. nov. 



Frond pinnate. Principal rachis stout, prominent, and rigid. Pinnules oblong- 

 lanceolate, or ensiform, alternate or subopposite, attached by the entire width of the 

 expanded base, somewhat decurrent. Middle nerve of the pinnules strong, rigid, 

 prominent, sharply defined, and prolonged to the termination of the pinnules. Lateral 

 nerves distinctly denned, departing from the middle nerve of the pinnules and from 

 the principal rachis on the lower side of the base of the pinnules, branching several 

 times, the branches anastomosing once or several times before reaching the margin of 

 the pinnules. Type : Pseudodanwopsis reticulata. 



I find myself compelled to place these plants in a distinct genus, as 

 their features are so constantly different from those of all previously de- 

 scribed genera that they cannot be well placed in any existing ones. The 

 facies of the plants and many of their details are clearly like those of the 

 genus Danceopsis of Heer, and from this resemblance I derive the name for 

 the genus. Banozopsis marantacea is described as showing not rarely an 



