Species novae Pleistocaeniae Marylandicae. 101 
Sunderland Formation. Near the headwaters of Island Creek, 
Calvert County. Maryland Geological Survey. 
3. Populus pseudo-tremuloides Hollick, |. c., p. 224, pl. LXX, fig. 5 
[fossil]. 
Leaf orbieular or transversely elliptical in shape, tapering abruptly 
and about equally to the somewhat decurrent base and acuminate apex, 
about !!/,, inch in length and width; margin entire; petiole */, inch in 
length; nervation 3-palmate, camptodrome; lateral primaries arising from 
very near the base of the leaf at an angle of about 45 degrees with the 
midrib and curving gently upward, each with three secondaries on the 
lower side curving toward the margin; median secondaries fine, about 
two on each side of the midrib, extending upward at acute angles and 
curving at their extremities, This leaf is hardly to be distinguished from 
many entire-margined forms of the living P. tremuloides Michx. and is 
similar to P. decipiens Lesq. (Tert. Fl., p. 179, pl. XXIII, figs. 7—11), 
although in this species the lateral primaries are more upright. 
Sunderland Formation. Near the headwaters of Island Creek, 
Calvert County. Maryland Geological Survey. 
4. Carpinus pseudo-carolinana Hollick, 1. c., p. 225, pl. LXXI, fig. 10 
[fossil]. 
Leaf about 1!/, inch long by tj, inch wide, oblong; abruptly acumi- 
nate at the apex, finely serrate; secondary nerves numerous, fine, sub- 
parallel, leaving the midrid at an acute angle and extending to the ser- 
rations of the margin. This leaf is almost identical with many smaller 
leaves of the living C. caroliniana Walt, which are frequently simply 
instead of doubly serrate. Numerous similar fossil forms have been 
deseribed under C. grandis Ung. and C. heerii Etts., and Lesquereux has 
figured specimens under the former name from the western United 
States which approach the Maryland leaves very closely (Tert. FL, 
pl. LXIV, figs. 8—10). They are described as doubly serrate, although 
the smaller specimens are figured as simply serrate, the same as the 
former. Practically the only difference between them is the abruptly 
acuminate apex of the latter, as compared with the more gradually taper- 
ing apex of the former. 
Sunderland Formation. Near the headwaters of Island Creek, 
Calvert County. Maryland Geological Survey. 
5. Quercus glennii Hollick, 1. c., p. 226, pl. LXXII, fig. 3—5 [fossil]. 
Leaves oblong-lanceolate (?) in outline, tapering to the apex, rounded 
or narrowed (?) to the base; margin somewhat irregular or wavy, minutely 
denticulate; secondaries springing from the midrib at varying angles, 
curving upward, sub-camptodrome, with fine nervilles extending to the 
denticulations. These leaves are named in honor of Dr. L. C. Glenn, in 
whose company they were collected. They are very closely allied to the 
living Q. wislizenii Engelm. 
Sunderland Formation. Near the headwaters of Island Creek, 
Calvert County. Maryland Geological Survey. 
