L. Lesquereux on fossil plants from Nebraska, 101 
ing species. In this leaf the nervation is craspedrome and 
camptodrome as in other species of Acer. 
43. Acerites menispermifolius, sp. nov.—A small leaf, trian- 
— in outline, five lobate, with short obtuse irregular lobes. 
rimary nerves in five from the base, the upper lateral one 
branching in the middle with one of the divisions ascending 
upward. The base of the leaf is nearly truncate. It may be- 
long to the former species or to a true Menispermum. Another 
small leaf, also triangular, with a cuneate base, three obtuse 
equal short lobes, the middle one abruptly short pointed and a 
similar kind of nervation, may be a variety of the same species. 
44. Negundoides acutifolia, sp. nov.—T'wo thin leaves, which 
appear to have been attached on a same common petiole, and 
therefore to belong to a compound leaf. The upper leaflet is 
smaller, ovate, lanceolate-pointed,.entire; the lower one is 
enlarged on one side, dentate-lobed, like an Acer, and with the 
same kind of nervation, while the other side is narrow, entire, 
with merely secondary nerves as in the upper leaf. Prof. Un- 
gerin his Chloris has figured and described, under the name 
of Acer, two lanceolate leaves, slightly dentate, which are op- 
posite on a common rachis, and belong, therefore, to a com- 
pound leaf resembling a Negundo. They have some affinity 
with ours. 
45. Paliurus membranaceus, sp. nov.—Leaf exactly oval- 
obtuse, of a thick membranaceous substance and’ polished sur- 
; palmately three-nerved from the base; lateral nerves 
ascending to above 4 of the leaf, branching outward and united 
to the thicker medial nerve by perpendicular veinlets. 
- Lhamnus tenazx, sp. nov.—A fine leaf represented by two 
fragments on the same specimen, It is lanceolate or slightly 
ovate-lanceolate, gradually tapering to a point and narrowed to 
@ short petiole still attached to a branch. The secondary 
“Nerves, 14-15 pairs, ascend in an acute angle of 30°, and curve 
along the borders ; the veinlets are obsolete, nearly continu- 
ous and perpendicular to the veins. 
1 47. Phyllites Rhotfolius, sp. nov.—T wo fragments of an ob- 
“ng subcoriaceous thick leaf, with a broad medial nerve and 
Secondary nerves alternate, emerging in an open angle, arched 
Str curving near the borders where they unite. The bor- 
tic of these leaves appear marked with distant irregular den- 
wlations like those of our Rhus cotinoides, which this species 
ra 1€8, also, by the nervation. The base and top of these 
ves are destroyed. 
ss . Juglans Debeyana (Populus ?) Heer—The general form 
‘ = leaves of this species, represented by many §| ens, 18 
wee, Oval and slightly obtuse ; sometimes oval-lanceolate, 
