-332 PROCEEDINGS OF SCIENTIFIC SOCIETIES. 
and has since formed an insignificant portion of the vegetation of the 
earth’s surface. Drawings were exhibited of cycads, conifers, and 
ferns from the mesozoic rocks of Europe, China, North Carolina, New 
Mexico, and Sonora, showing the similarity of the flora of different 
cunntiibs in the triassic and jurassic periods. 
Seventh, — With the commencement of the cretaceous period the 
flora of the world was again revolutionized, and the highest order of 
plants — the angiosperms — make their first a EE in Europe, 
chalk period to the present time, showing great permanence in the 
physical condition of the count 
Eighth, — Of our Eocene Ara we have obtained few specimens. 
The flora of Europe, during that period, was decidedly tropical in 
arac 
Ninth, — The Miocene flora of America has been very fully illustrated 
by the collections made in Mississippi, on the Upper Missouri, near 
the mouth of Frazer River, on the McKenzie, and on Disco Island, off 
the west coast of Greenland. Over one hundred species have been 
obtained from these localities, some of which were common to them 
all. Several of these species are now living in our c pet and quite 
a number have been found in the Miocene tertiary of Europ 
t important part of Dr. Newberry’s paper was t sine which’ 
included a comparison of the Miocene flora of America with that of 
First, ote Phe living flora of North America is ae eee progeny 
of the cretaceous and tertiary floras of the same continent; most of 
the genera of the earlier floras being co: aira. into the ests one, 
and many species of the Miocene being apparently identical with so 
now living. 
Second, —In the Miocene epoch, the European and American conti- 
nents were connected at the north, pred over this bridge the American 
flora passed to Europe, leaving its rds on Disco Island, aga 
the Island of Mull, ete. This flora ka OR of a temperate clima e, and, 
following a depression of temperature, it replaced the Eocene nd 
