214 Dr. J. 8. Newberry on Ancient Vegetation of N. America. 
aticus, Ostrea congesta, Baculites ovatus, Ammonites placenta, Sow 
phites Conradi, Ptychodus W hipplei, &c. 
The botanical character of this group of plants is, in all essen: 
tial respects, just what I represented it to be in my letter to 
Meek and Hayden. Among them are certainly Populus, Salia, 
LCE a SE orton oa a ig as: Sea 
the Lower Miocene,” but is a general receptacle for fossil leaves 
of all ages of which the botanical affinities are doubtful, just a8 
Carpolithes is a general name for fossil fruits. 
It is greatly to be regretted that Prof. Heer could not have 
4 
e remarks of Prof. Heer on the fossil plants from the Pacific 
. coast described by Mr. Lesquereux, are exceedingly interesting 
as forming a new page in the botanical history of American ge 
ogy, and yet the quite different flora which has come under my 
observation from the Miocene strata of another part of the com 
tinent proves that what he has predicated of the flora, and henc? - 
the climate of the continent, though doubtless true of the reg 
where Dr. Evans’ fossils were found, is not of universal app 
cation. : ; 
The study of the floras of the different geological formations 
has always seemed to me t promise much toward giving ei 
direct debris of the ancient land—have been to me objects 
Special interest and attention. 
of North America may be very briefly stated as follows: 
World, which has been so fully described ; most of the gener; 
and a larger number of species than at any subsequen 
