110 THE OLDER MESOZOIC FLOE A OF VIEGINIA. 



This plant is clearly a Cyca elites, as Emmons has determined it to be. 

 It resembles very strongly Cycaclites Boemeri, Sehenk, plate xi, fig. 1, "Foss. 

 Flor. Nordwest. Weald.," from the Wealden of Germany. It is notewor- 

 thy that many of the plants from these upper strata strikingly resemble 

 Wealclen forms. Among those already mentioned, we have the following 

 plants comparable to Wealden forms : Cyclopteris dSscurus is not unlike 

 Sagenopteris Mantelli, Sehenk., "Foss. Flor. der Nord. Weald," plate x, fig. 

 5, while Walcliia brcvifolius may be compared with Sphenotepis Kurriana, 

 and Walcliia gracile with Sphenolepis Sternberg ian a, Sehenk, from the same 

 formation. These resemblances, with others yet to be noted, are the more 

 worthy of notice as I have found man}- Wealden plants among the upper- 

 most beds of the border belts of the Mesozoic in Virginia. This Cycaclites 

 is very near t©, if not identical with, Cycaclites Blanfordianus, Old. & Mor., 

 "Pal. Indica," series ii, plate ix, fig. 2. It may also be compared with 

 Cycaclites longifolius, Nath., "Bidrag till Sveriges Foss. Flora," plate xiii, 

 figs. 1-3, from the Rhsetic of Palsjo, Sweden. 



Cycadites longifolius. 

 Plate LI, Fig. 7. 

 Euimons's "Aruer. Geol.," p. 115, fig. 82. 



"Stem, or petiole, channeled; leaves opposite, thick, acute; margins thickened, 

 and leaves standing at an acute angle with the petiole. This has a wider leaf than 

 the former, and was probably a larger plant. The frond was probably 14 or 15 inches 

 long, and the leaves 3 inches long. The specimen adheres to the rock by the back of 

 the frond, and hence the midrib is indicated in this case only by a longitudinal chan- 

 nel. iSTo side veins can be seen. The figure fails to represent the midrib. Occurs at 

 Lockville." 



Owing to the omission of the midrib in the leaflets, the facies of this 

 plant is of course disguised. This is another of the cases where it is very 

 desirable to see the original of the figure, in order to make out the true na- 

 ture of the specimen, since Emmons's figure fails to give the true character. 



Podozamites lanceolatus. 



Plate L1II, Fig. 2. 

 Emmons's "Amer. Geol.," p. 116, plate 3, fig. 7. 



"Stem, or midrib, strong, striate; leaves nearly opposite; lanceolate; nerves 

 very distinct, and convergent to the apex. The detached leaves are very numerous iu 

 the slates at Ellingtons, and some are half an inch wide." 



