s 
Lesquereux. | 330 | Mareh 1, 
branch terminates abruptly in an obtuse point, to which is attached a 
somewhat thick leaf of Cordaites character, or with parallel nervation. 
The top of the main stem bears a tuft of three leaves of the same character 
as that of a, flat, linear, one centimeter broad. The two on the left side 
are somewhat thick and the nervation immersed in the epidermis; that 
on the right side in 0 is decorticated or represented by the impression of 
its lower surface, with primary nerves distinct to the eye, three in one 
millimeter, with two or three distinct intermediate ones. The other leaves 
attached along the stem are those of Dicranophyllum, with nervation more 
or less obsolete by the thick epidermis, and are of the same character as 
those of fig. 2. We have here, therefore, in the abrupt termination of the 
branch a, and the large leaves at the top of the main branch, the evident 
characters of Cordaites, while the stem leaves are as evidently of Dicrano- 
phyllum. One of our specimens, fig. 3, represents a small fruit, oval and 
similar in form to the bulbilles, which Grand’ Eury has seen in the axils of 
the leaves of Dicranophyllum, Pl. XXX, fig. 8, of his flora, but somewhat 
larger, with flattened borders, and of a thick texture ; at least its surface is 
covered by a pellicle of coal as thick as that upon leaves of Dicranophyllum. 
From under it, or as in its axil, comes a Dicranophyllum leaf four milli- 
meters broad, soon splitting twice, and separating in three narrow branches, 
hamulose in their curve, and dividing again in filiform lacinie at their 
extremities. The character of nervation, four primary distinct nerves in 
one of the laciniz, as seen in a, where the thick epidermis is destroyed, 
are exactly the same as in the leaves of fig. 2. Hence I believe that we 
have here positive evidence of the relation of these organs to the genus 
established as Dicranophyllum by the celebrated French author and of 
that of this genus to the order or family of the Cordaités. 
[TaNIOPHYLLES. |] TaNroPpHYLLUM, Lesqx. 
Stems large, leaves crowGed, flat, thick, exactly linear, decurring at the 
base, surface smooth, opaque or shining. 
The plants referred to this division resemble those of the narrow-leaved 
Cordaites by the size of their leaves only. These are still narrower, more 
exactly linear, and their surface is not striate or marked by nerves, neither 
when corticated nor when deprived of their coaly epidermis. Seen with a 
strong glass, their surface appears lined lengthwise and crosswise by a very 
thin areolation composed of appressed square meshes resembling those of 
the finest tissue. The leaves are, as far as can be seen, very long. I have 
not been able to find one in its entire length in any of the specimens ex- 
amined. Their point of attachment still more than their smooth surface 
separates them from Cordaztes, this point being marked by a linear nar- 
row scar, rounded and slightly inflated at its lower end, generally pointed 
or acuminate upwards. The species referred to this group represents evi- 
dently a different generic division if not a separate family. 
