24 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 
presents somewhat intermediate conditions between the phylloclad 
and the flattened leafy lateral branch, for it is at once markedly 
phylloclad-like and at the same time shows several leaves attached 
to the flat surface. Figures 6, 7, 8, Pl. 7, show the characters of the 
flattened lateral leafy branches, X 7, as they appear when detached 
from their axes. This remarkable genus is apparently not referable 
to any fossil plant heretofore described and, moreover, entirely 
differs in its internal structure, as we shall show presently, from the 
living genus Phyllocladus, so that it is not permissible either on the 
one hand to refer it to the somewhat vague Cretaceous genus Thinn- 
feldia, or on the other to the equally problematic Protophyllocladus. 
Turning our attention now to the internal structure of this remark- 
able fossil plant, we have in fig. 5, Pl. 28, a general view of a trans- 
verse section through one of the phylloclads, X то. There is evi- 
dence in the form of woody cylinders of the presence of three 
hranches in the substance of the flat axis. The most central of these 
is the largest, while the uppermost is the smallest. The narrow 
wings of tissue stretching on either side of the woody cylinders con- 
stitutes the lamina of the phylloclad, in which lie the traces of two 
or three leaves. The magnification, however, is not great enough 
to show these. It is not easy to recognize any assimilatory tissue in 
the lamina on account of the very dark conditions of the cells which 
compose it. Regarded superficially the lamina is covered with 
numerous stomata, which are surrounded, in addition to the guard 
cells, by four or five accessory cells. The presence of these accessory 
cells does not appear to be of much importance in tracing relation- 
ships with other conifers in which the surface characters have been 
described, since the presence of accessory cells is a very common 
feature in plants of various afhnities, which have the xerophytic habit. 
Figure 8, Pl. 28, shows a transverse section, X 40, through the base 
of one of the phylloclads. There is a single woody cylinder present 
in this case, which is winged above and below. We have not found 
any stems belonging to the species which are without these laminar 
wings, even in their lowest portion. In the pith may be seen sclerotic 
cells, similar to those occurring in Brachyphyllum and Geinitzia. 
We have not observed sclerotic tissues in the cortex of the species 
under discussion. Leaf-traces may be seen on either side of the cen- 
tral cylinder and in the substance of the lateral wings. Figure 7, Pl. 
28, shows a transverse section, X 20, through the blade of another 
