228 SYSTEMATIC PALEONTOLOGY 
Genus ULMUS Linne. 
ULMUS BETULOIDES 0. sp. 
Plate LXX, Fig. 1. 
Description—Leaf oblong-ovate (?) in outline, serrate; secondary 
nerves leaving the midrib almost at right angles, mostly forking or 
branching once or twice near the extremities, each division terminating 
in one of the marginal serrations; base and apex not known. This leaf 
by reason of the obtuse angle of divergence made by the secondaries with 
the midrib, appears to be distinct from any species with which it was 
compared. In some respects it resembles a Betula rather than an Ulmus, 
but it apparently was inequilateral or cuneate at the base, as indicated 
by the more rounded outline on the left side and the slightly curved mid- 
rib. With an apex such as that shown in Fig. 11, Plate V, the leaf would 
approach very closely to many forms of U. americana L. 
Occurrence-—SuNDERLAND Formation. Point of Rocks, Calvert 
County. 
Collections ——Maryland Geological Survey. 
ULMUS PSEUDO-RACEMOSA I. Sp. 
Plate LX XI, Figs. 11-13. 
Description—Leaves varying in size, averaging about 2 inches in 
length by 1 inch in width, oval to somewhat obovate in outline, inequi- 
lateral, sharply and more or less doubly serrate; apex rather abruptly 
acuminate; base cuneate or cuneate-cordate; petiole short; nervation 
simply pinnate, craspedodrome, the secondaries numerous, flexuous, Vary- 
ing in their angles of divergence from the midrib and mostly once to 
several times forked, especially towards their extremities, the branches 
