178 BOTANICAL GAZETTE [FEBRUARY 
outline, with an obtusely pointed apex, about 1 cm. in length by 
1.5mm. in greatest width. All the leaves in a whorl are of approx- 
imately the same size. 
From their position as fossilized, they seem to have been super- 
imposed from node to node, and each verticil seems to have been 
in a plane very oblique to the supporting axis and not at right 
angles to it, so that the foliage-bearing branch with its unit whorls 
is, as a whole, bifacial. 
Leaf substance thick and coriaceous. Within the limits of the 
specimen there is scarcely any diminution in the size of the leaves or 
length of the internodes distad from 
the main axis, although the branch 
itself tapers slightly. 
The venation is puzzling because 
of the thick nature of the leaves and 
their indifferent preservation, some 
leaves apparently showing a thick 
prominent midrib, while in others 
its place was apparently occupied 
Fic. 1 by what seem to be several very 
fine vascular strands. 
The writer’s final conclusion is that each leaf has a single midrib, 
which was broad, but immersed in the leaf substance and not at 
all prominent in life. This midrib may have been made up of 
several vascular strands, and varying conditions of preservation 
account for the deceptive appearances in some of the leaves. 
The accompanying text figure (fig. 1) is from a drawing (X4) 
which shows three verticils, and is drawn from a counterpart of 
the type which is shown natural size on pl. xvmt. 
In the absence of any very complete knowledge of the older 
mesozoic Equisetales, the affinities of the present species are more 
or less conjectural. It fulfils all of the requirements of HALie’s 
definition of the genus Neocalamites, and the genus itself seems to 
be a natural one. It is more like Calamites, however, than the 
species which HALLE has referred to the genus, and suggests most 
strongly the Annularia type of paleozoic calamite foliage, as, for 
example, the widespread type known as Annularia sphenophylloides, 
the only difference being that in the triassic Neocalamites the leaves 
