484 



SYSTEMATIC PALEONTOLOGY 



shaped, resembling coarse teeth; apex acuminate; base wedge-shaped 

 ( ?) ; midrib straight ; secondary nerves slender and somewhat flexuous, 

 forming acute angles with the midrib, each terminating in the extremity 

 of a lobe, except the lowest ones, which curve upward sub-parallel to 

 the margin. This species closely resembles some forms of the living 

 Q. emoryi Torr. It is represented in the collection by a number of im- 

 perfect specimens. Named after the collector, Mr. W. V. Lehman. 



Occurrence. — Calvert Formation. Good Hope Hill Eoad. 



Collection. — Maryland Geological Survey. 



FIG. 1— FOSSIL LEAVES FROM GOOD HOPE HILL, PRINCE GEORGE'S COUNTY. 



Figs, a, b. Quercus lehmanii n. sp. 



Figs, c, d. Rhus milleri n. sp. 



Figs. 6. Ct¥salpinia ovalifolia n. sp. 



Fig./. Ulmus basicordata n. sp. 

 Fig. (J. Picris scrobiculata n. sp. 

 Fig. h. Phyllites sp. ? 



Order ULMACE.^. 



Genus ULMUS Linne. 



Ulmus basicordata n. sp. 



Desci'i'ption. — Leaf very small, 0.5 in. long by 0.3 in. wide, inequi- 

 lateral, somewhat curved towards the narrower side, serrate ; base cuneate- 

 cordate; secondary nerves numerous, about 8 on each side, simple or 

 the lower ones once-forked, irregularly disposed, forming varying angles 

 with midrib, all curving upward and terminating in the serrations of 

 the margin. 



This little leaf has considerable resemblance to some of the forms of 

 Planera ungeri Ett. (Fos. Fl. Wein., p. 14, pi. ii, figs. 5-18) especially 

 to fig. 12, Iv c, but in ours the base is more prominently and distinctly 

 rounded and cordate. It differs from this figure, however, far less than 

 Ettingshausen's figures differ between themselves. 



