Lesquereux. | 332 {Mareh ], 
or irregularly lined and wrinkled, marked by numerous leaf scars, some 
of them distinctly seen, some others destroyed or obscure, so that their 
relative position is not definitively recognizable. They are placed in 
spiral, but their place is not always indicated by the scars. These scars 
generally obtuse and inflated at the base, where they measure one milli- 
meter in diameter only, are gradually effaced and narrowed upwards, and 
therefore their character is far different from that of the Cordaztes scars of 
leaves. The bark of the stem also is much thicker, not merely a thin 
smooth pellicle of coal, but a coating of shaly carbonaceous matter one milli- 
meter thick or more. The divergence of the leaves from the stem is at a 
far less degree than in the former species ; the thickness of the leaves and 
their surface tissue are the same. 
Same Habitat as the former. Mr. I. F. Mansfield. 
T 2NIOPHYLLUM CONTEXTUM, Sp, nov. 
Pl. LIIL, fig. 2, 2a. 
Leaves narrow, linear, two millimeters broad, apparently very long, ob- 
tuse, twisted or interlaced together in tufts, and erect, diverging and 
curved in the upper part, surface opaque. 
The tissue of the epidermis is of the same character as in the former 
species, from which this one differs merely by the narrower leaves more 
compactly bound together in the lower part. They appear to have been 
originally fistulose and flattened by compression. Their substance is thick, 
the epidermis a coaly layer irregularly disrupted in minute elongated 
granules, as marked in fig. 2a. I have not seen any of these leaves in con- 
nection with a stem. Though I do not consider this species as the same as 
the former, the characters are very similar. By compression and flatten- 
ing an inflated border is here and there formed along some of the leaves, 
and by their superposition, it gives to the upper ones the appearance of a 
middle nerve. Ina few cases when the heavy coating of coaly matter is 
removed, the veins appear in fasciles similar to those of the leaves of 
Dicranophyllum. These leaves are of the same kind as those mentioned 
onp. , a bundle of whichseems connected toan Artisza in the description 
of Cordaites specimens. 
Habitat. Same asthe former. Mr. I. F. Mansfield. 
DESMIOPHYLLUM, Lesqx. 
Leaves narrow, sublinear, gradually enlarged from the base, where they * 
are joined three or four together and coming out from a common point of 
the stem. Surface irregularly ribbed lengthwise by prominent large 
bundles of nerves, buried under the epidermis, which is thick, irregularly 
granulose, by splitting of the coaly surface as in the species of Tenio- 
phylium. 
From this coincidence of characters in the surface of the leaves, I was 
inclined to consider this peculiar branch as referable to the same genus. 
It, however, greatly differs by the agglomeration at their base of some of 
