. MESOZOIO PLANTS OF NORTH CAROLINA. 1 1 1 



This plant is a true Podozamites, but not the P. lanceolatus of European 

 authors. Hence, as this name is preoccupied, another must be chosen. It 

 might be called Podozamites JEmmonsi. 



Podoz'amites longifolius. 



Plate LIII, Fig. 5. 

 Emmons's "Am. Geol.," p. 116, fig. So. 



"Leaves linear-lanceolate, constricted immediately at the base, nerves fine, con- 

 vergent. The Podozamites lanceolatus and the P. longifolius differ. In the latter the 

 nerves are much finer, and the leaves narrower in proportion to their length, and less 

 constricted at base, and hence it is possible that it should be transferred to another 

 genus. The frond is 7 inches wide, aud was probably 2 feet long. The portion of the 

 frond obtained was about inches long. Its leaf was thinner than the Cycadites 

 longifolius." 



This plant is evidently not a Podozamites, and to judge from the figure 

 the leaflets were not constricted at base, or but slightly so on the upper 

 side, while they are decurrent on the lower side. The nerves do not appear 

 to be convergent. It seems to be a Dioonites, and is much like Dioonites 

 Humboldtianus (Pterophyllum Humboldtianum, Dunker) from the Wealden of 

 Germany, which Schimper makes a Dioonites. The midrib, however, of the 

 North Carolina plant is much smaller, and the leaflets wider than the cor- 

 responding parts of. the Wealden fossil. It is probably nearly allied to the 

 plant from the Rajmahal Group of India, figured on plate xli, figs. 1 and 2, 

 "Pal. Indica," series ii, 7, which Feistmantel calls Zamitcs proximus. It 

 closely resembles this plant, but the leaflets are wider and the midrib 

 stouter. The Zamites proximus seems to be a true Dioonites. 



Pterozamites decussatus. 

 Piute LI, Fig. 2. 

 Emmons's "Am. Geo].," p. 117, plate 3, fig. 1. 



"Frond pinnate; petiole strong, striate; leaves long, obtuse, many nerved, and 

 standing at right angles with the petiole, and rather wide. It occurs at Ellington's in 

 the blue slate." 



This plant is evidently a Pterophyllum of the type of Pterophyllum 

 Jcegeri. It seems to be closely allied to Pterophyllum cequale, Nathorst, 

 from the Rhsetic of Sweden. Compare figs. 6, 8, 10, plate xv, "Floran vid 

 Bjuf." The tips of the leaflets do not seem to be preserved in the speci- 

 men figured by Emmons. It may be called Pterophyllum decuss&tum. 



