186 ROYAL SOCIETY OF CANADA 
age of the strata on the south side of granite range were not able by 
this means to tell the age of the slaty rocks on the north side, they 
were therefore described, the lower as “ Dark,” the upper as Pale Argil- 
lites. Studies in later years have shown that these argillites or clay 
slates are equivalent to the Upper Silurian of the northern counties of 
New Brunswick; which Upper Silurian series or terrane, as it contains 
strata equivalent by its fossils to the Upper Helderburg formation, is 
also Ko-Devonian. As the fossil above described is in the upper part 
or “ Pale Argillites ” it may be placed as Eo-Devonian. 
The locality is in the settlement of Flume Ridge, Charlotte Co., 
in the bank of a small stream, Cox’s Brook, tributary to the Magagua- 
davic R. The slates here are somewhat altered and compressed, and 
thus the details of the fossil are obscured. 
With this fossil are fragments of long, straight, smooth stems. 
They are about 5 mm. wide, with one or two narrow longitudinal ribs, 
and may belong to a fern. 
_ From the size of the scales on this strobile and their closeness it 
seems possible that it might belong to a species of Lepidodendron like 
L. Chemungense, Dawson. i 
One hesitates to claim the existence at so early a period as the 
Silurian, or the Eo-Devonian, of a plant of the sub-class of Lichens, for, 
according to Zittel (Schimper), no remains of plants of this sub-class of 
a greater age than the Tertiary are known. But the associations of the 
plant hereafter described with other plant remains is such as to suggest 
such a reference. It does not appear to have grown within the tissues 
of another plant as some hereafter described appear to have done, but 
to have spread its shield over a mat of fallen vegetation. Its mode 
of branching, flat radiating growth and thick substantial thallus, would 
point to Lichens or Fungi as the groups among recent plants to which 
it might be referred. 
RHIZOMORPHIA LICHENOIDES, n. sp. See PI. I, fig. 1. 
A rather thick thallus growing from a central point and radiating 
in all directions. Method of branching of the lobes dichotomous; 
growth of the lobes not equal, but some branches extending more 
rapidly than others; the outer forks of the lobes of thinner texture 
than the inner, older ones. 
Certain disk-like and more shining spots on the surface of the 
thallus may indicate the sporangia of this plant; they are from 1 to 
14 mm. in diameter. 
