108 THE OLDER MESOZOIC FLOE A OF VIRGINIA. 



the Carboniferous .system. Its leaves are scarcely larger, and are nearly of the same 

 form. It occurs at Lockville. Some species (specimens ?) are 6 or 7 inches long, and 

 appear as if the plant was procumbent." 



It will be seen from this account that no definite information is given 



concerning the nervation and structure of the leaves. The plant appears 



to be a Cheirolepis, and may be a new species. It is, however, very near 



to the more slender forms of Cheirolepis Miinsteri, Schimper, the forms that 



Schenk called Brachypliyllum Miinsteri. I have but little doubt that it is 



identical with this plant. 



Walchia gracile. 



Plate L, Fig. 3.. 

 Emmons's "Am. Geol.", fig. 75, p. 108. 



" Stem procumbent, small, slender ; leaves alternate, rather spatulate, and obtuse. 

 This is a very small plant, and it is uncertain whether it should be regarded as a 

 Walchia or not. The figure is twice the natural size. It belongs to the gray sand- 

 stone, 300 to 500 feet above the blue slate at Elliugtou's." 



This appears to me to be merely a slender specimen of the above- 

 described plant, viz., Cheirolepis Miinsteri. The figure is twice enlarged. 



Walchia variabilis. 

 Plate L, Fig. 4. 

 Emuions's "Am. Geol.," fig. 70, p. 108. 



" Leaves lanceolate, acute, rather wide, grasping, decurrent. The leaves stand 

 thickly upon the stem, but on different ones their width as well as length is variable, 

 which may be due to compression, or the direction in which they have been compressed. 

 The widest part of the leaf is about one-fourth of an inch from its apex, and its length 

 from the base, in some of the leaves, is about half an inch. It has a resemblance to 

 Unci/otitis, but the leaves do not vary in size, as in the Williamsoms, neither are they 

 hooked at their apices or unciform. The leaves when pressed laterally appear much 

 narrower than when spread out naturally. It occurs at Turner's Falls, in the brown- 

 ish flags, at least 500 feet above the second conglomerate." 



There seems to be hardly a doubt that this plant is PachypliyUum pere- 



grinum (Lindl. and Hutt), Schimper. Emmons says nothing about the 



texture of the leaves, but his figure indicates on some of them a sort of keel. 



PachypliyUum peregrinwn comes from the lower Lias of England, and is the 



Araucaria peregrina of Lindley and Hutton, depicted in the " Fossil Flora 



of Great Britain," plate lxxxviii. This plant from North Carolina comes, 



according to Emmons, as stated above, 500 feet above the horizon of the 



most common cycads of the North Carolina Mesozoic. 



