: 
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L. Lesquereux on fossil plants from Nebraska. 99 
longer than the medial one, all obtusely pointed. The nerva- 
Sassafras Mudgii, sp. nov—Though nearly similar to 
the former in its general outline, it is evidently a different 
species. The leaf, which is nearly entire, is 8 inches long, 5 
. 
inches broad, at the point of the lateral lobes, gradually nar- 
- rowing to the petiole, three lobate from the middle, Lateral 
lobes oblique, not half as much diverging as in the former 
species, proportionally narrower and more obtusely pointed. 
The medial lobe is twice as long as the lateral ones ; substance 
of the leaves thinner, slightly membranaceous, polished. 
. Sassafras subintegrifolius, sp. nov.—The leaf appears 
to be trilobate or merely emarginate at its rounded top, 
broadly oval, tapering in an obtuse angle to the petiole, entire, 
subcoriaceous. It is palmately triple-nerved ; the lateral 
nerves not being opposite but at a short distance from each 
other, as it is often the case in the genus Sassafras. This 
y is distantly related to S. Asculapi Heer, of the Swiss 
ocene, 
35. Proteoides Daphnogenoides Heer.— Leaves ovate-lan- 
ceolate near the base, tapering upward to a very long, acute, 
slightly scythe-shaped point, smooth and coriaceous, attenuated 
downward to a short thick petiole ; medial nerve narrow, sec- 
ondary nerves obsolete, few, ascending under a very acute 
angle along the borders. These leaves are very long. Our 
specimens show two nearly whole leaves, one of which is 8 
inches long, and only one inch broad near the base. As the 
Species of Prof, Heer in the “‘Phyllites du Nebraska” are repre- 
sented by mere small fragments, it is not positively certain 
that ours is the sa: 
) same. 
36. Proteoides acuta Heer.—Leaves narrower than in the 
former, with a longer tapering base, undulate borders, thinner, 
and not polished on the surface. No trace of lateral nerve 
37. Lyriodendron intermedium, sp. nov.—A part of a leaf 
evidently belonging to this genus. The upper segments are 
Comparatively long, obtuse, at a distance from the lower ones, 
Indicating a proportionally long and narrow leaf. 
- Lyriodendron giganteum, sp. nov.—A species repre- 
Sented still by a broken fragment. It is only one of the supe- 
