Dr. J. 8. Newberry on Ancient Vegetation of N. America. 209 
The collection of fossils made, both animal: and vegetable, is 
quite large, and, with considerable new matter, includes what is 
much better, many well known species of which the geographical 
range ee be seen to be much greater than has been heretofore 
e 
on the geology of the country west of the Mississippi which I 
_ have made or have in preparation for the general government. 
The paragraph to which I allude is as follows :— 
“Your views of the gradation of the flora of North America agree 
Petlectly with what we find in Europe. This led me td believe that the 
Plants of Nebraska belong to the tertiary and not to the cretaceous forma- 
It is true that I have seen only some drawings which were sent to 
at in America the cretaceous flora has had the characteristic 
IS of the tertiary ; and this would be the case if these plants did be- 
Sng to the Cretaceous,” 
—— Abwill be ‘ Ags 
1 be seen that Prof. Heer in this paragraph makes seve- 
tal distinct statements, which for the sake of brevity, I will no- 
; bry the order in which they occur. They are, aD i 
ik + dpa plant I supposed to be a Credneria is very 
= Us leuce, Ung. : : : 
| <a nie Littingshausenia (called erroneously Bitinghausiana) is 
4 Mey determined, | 7 
an the genus Hitingshausenia is badly founded and has 
4th, That all the other plants enumerated by me are repre- 
4ertiary and not in the Cretaceous. 
in ree it is improbable that in America the Cretaceous 
‘seeps. the characteristic plants of the Tertiary, as would be 
ie XXIX, No, 
"OND SERIES, 96.—MARCH, 1860. 
