100 = L. Lesquereux on fossil plants from Nebraska. 
rior lobes of the leaf, with the sinus which separates the upp! § 
segments. It is broadly oval-oblong, very obtuse, thick ani 
coriaceous, with the medial and the three secondary nervé | 
which generally enter the upper lobes of a Lyrio 
This leaf is evidently of very. large size. : 
39. Magnolia tenuifolia, sp. nov.—A large leaf of thin te 
ture, 6 inches long, 22 inches broad, oblong, obtusely pointel?, 
slightly rounded and attenuated to a pretty long petiole. Be | 
ondary nerves narrow, open, angle of divergence about 60; | 
medial nerve sharply grooved. el 
40. Magnolia alternans Heer.—There is only one specumeél 
recognizable of this species. It is like that of fig. 3, pl. 3, 
the Phyllites du Nebraska. The leaf is coriaceous, ovate-oblou 
lancolate, gradually narrowed to the petiole; medial nett 
thick, lateral veins ascending in acute angle, curving and alae 
tomosing along the borders. : 
41. Dombeyopsis obtusiloba, sp. nov.—The finest thes 
of the whole collection. The leaf is whole, merely deprived 
its petiole ; 7 inches long, 5 inches broad near the base whet 
it is the broadest. Its general outline is triangular-elongatel, 
rounded subcordate at base, gradually diminishing to an obi’ | 
point, deeply sinuous or obtusely irregularly lobed on the bot: 
ders. It is palmately seven-nerved at the base, the ™ 
nerve thick, as well as the two proximate ones which ascend #0 
% of the leaf in an acute angle ; the ultimate or basilar nev 
? 
c. 
42. Acer obtusilobum ? Ung.—An entire, well preset 
leaf, membranaceous, cm 
mately five-lobed ; basilar lobes broad and undulate, supe 
divisions short and obtuse.—This species might be copsid- 
ered as identical with that published under this name by es 
ger (Chloris, p. 134, pl. xliii, fig. 12 and 13), if it was not 
a marked difference in the nervation. In Unger’s g, th? 
upper lateral primary nerve divide upward near the middle 
and the branch ascends parallel to the medial nerve, wnitl22 — 
with the secondary nerves above. This kind of nervation, ' 
sembling that of a Menispermum, is observable in the follo¥ | 
a 
an 
at 
