BERRY: MESOZOIC FLORA OF ATLANTIC COASTAL PLAIN 391 
increase in mean annual temperatures in proceeding southward 
from the latitude of Greenland. 
Conditions comparable to those of Woodbine time occur in 
those areas where the tropical flora extends many degrees farther 
than its normal range to the north or south of the equator, becom- 
ing more or less mixed with temperate elements to form the flora 
typical of temperate rain forests like that of New Zealand, so 
often cited. The extension of the Upper Cretaceous flora south- 
ward across the present torrid zone indicates less torrid conditions 
during the Cretaceous than in the present day tropical belt, so 
that it will be extremely difficult, even if it ever becomes possible, 
to discriminate between subtropical and warm temperate Cre- 
taceous climates, and to assert with any confidence that the 
imaginary line separating the two shall be placed in the South 
Atlantic or Middle Atlantic states or still farther to the northward. 
The appended table shows the range in the United States of 
the species discussed in the following notes: 
GY MNOSPERMAE 
PODOZAMITES LANCEOLATUs (L. & H.) F. Braun 
Zamia lanceolata Lind. & Hutton, Foss. Fl. 3: 121. pl. 194. 1836. 
Podozamites lanceolatus F. Braun, in Miinster, Beitr. Petref. 2°: 33. 
1843. 
This form, described originally from the English Oolite, has a 
very wide recorded geological and geographical range. A large 
humber of Jurassic varieties have been described, and indistin- 
guishable forms occur in both the Lower and Upper Cretaceous of 
: th America and Europe. In the Upper Cretaceous it occurs 
in the Raritan formation from Long Island to Maryland and in 
the Cenomanian of Bohemia, as well as in the Dakota group of 
Kansas, 
While it is almost inconceivable that these similar detached 
leaflets from such various horizons represent a single botanical 
“Pecies, no criteria other than the unsafe one of stratigraphic 
Pesition are available for their discrimination. The Arthurs Bluff 
collection contains a single perfect and typical leaflet, and whether 
7 18 Specifically identical with all of the other forms referred to 
‘species or not, it is of great interest in showing the presence 
of a 8ymnosperm of this type in the Woodbine flora. 
