332 
these points can be settled. In view of the fact that the leaves 
of V. dentatum, L. vary on the same bush, almost as greatly as 
do these fossils, it would seem as though a conservative attitude 
would be the safest, leaving to others the responsibility of seeing 
generic and specific differences in the many leaf-forms repre- 
sented. 
Leucothoé racemosa, (L.), A. Gray. 
Clethra alnifolia, L. 
Cinnamomum, sp ? 
Laurus, sp? 
Persea Borbonta, (L.) Spreng. 
Ulmus Americana, L. 
Planera aquatica, Gmel. 
loxylon pomiferum, Raf. 
Morus, sp? 
Hicorta Pecan, (Marsh), Britton. 
Ostrya Virginica, (Mill) B.S.P. 
Quercus, sp? A number of entire, sparingly-toothed or irregu- 
larly-margined leaves have been referred to this genus, which ap- 
parently have affinities with Phellos, imbricaria or heterophylla, 
but, as a rule, the nervation is more or less obscure. 
Castanea, sp? 
Amongst the remains of uncertain affinities two are very 
prominent by reason of their abundance. One of these is a large 
leguminous pod, with a dorsal suture and prominent wing. All 
attempts thus far made to identify it positively with any North 
American genus has failed. Its nearest affinities seem to be with 
Mesoneuron, Pongamia (Derris) or Lonchocarpus, but na leaves of 
either one of these genera have yet been satisfactorily identified. © 
There would be nothing startling in the occurrence of an Eastern 
Asiatic genus amongst this flora, as Diospyros is common to both, 
and the well known similarity of the two floras at the present day 
has long been a subject of comment. 
The other organism which has not yet been definitely placed 
is a reed or palm-like blade, with parallel nervation. Only frag- 
ments have been found, and these have been compared succes- 
sively with palms, grasses and sedges, but without satisfactory 
results. Similar organisms have been described by Lindley and 
