78 THE OLDER MESOZOIC FLORA OP VIRGINIA. 



different from this plant, and indeed from all previously described plants of 

 the genus Podozamites. It is then a new species, and I have given it the 

 name of its discoverer, as the name Podozamites lanceolatus is preoccupied, 

 Schimper having changed the Zamites lanceolatus of Lindley and Hutton to 

 Podozamites lanceolatus. This species and the one next to be described sug- 

 gest very strongly an affinity with some conifers. Emmons says that the 

 detached leaves are numerous in the slates at Ellingtons, in North Caro- 

 lina, some of them being 12 millimeters wide. I have found only a single 

 small specimen in the Virginia Mesozoic, and it is certainly quite rare there. 

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

 Ctenophyllwm truncatum, &c, in sandstone between the lower and main coal 

 seams. 



Podozamites tenuistriatus. 



Plate XLII, Figs. 2-5. 

 Zamites tenuktriatm, Eogers. 



Leaf f. Midrib rough, and irregularly striate. Leaflets going off at an angle of 

 45°, or at a right angle, inserted by a twisted, very short pedicel, which is slightly 

 decurrent, very deciduous, abruptly narrowed at base, and rounded off more sharply 

 on the lower side, but more gradually on the upper side, widest near the base, and 

 tapering thence to the summit, quite closely placed, subopposite or alternate, nerves 

 very delicate, forking at or near the base, and sometimes forking again a short dis- 

 tance above the base, then parallel to near the extremity, where they converge and 

 meet. 



The nerves of this plant are usually so fine that they cannot be seen 

 distinctly, except near the base where they are rather stronger. They seem 

 to differ from those of most species of Podozamites, in branching more than 

 once in some cases. The leaflets, too, differ from those of most previously 

 described species of the genus, in their closeness, small size, and the large 

 angle under which they leave the midrib. It is something like Podozamites 

 angustifolius, Schenk, of the Rhaetic near Bayreuth, but the leaflets of 

 Schenk's plant seem to be more remote, and to go off under a much smaller 

 angle. Professor Rogers mentions in his account of the plants of the coal 

 of Eastern Virginia, a fossil which he calls Zamites tenuistriatus, which must 

 be the plant now in question. He seems to have obtained only obscure 

 specimens, but distinct enough to make out the shape of the leaflets, and 

 the general character of the nervation, which features are evidently, from 



