10 ROYAL SOCIETY OF CANADA 
limits can be assigned to the volume of this zone, but it is probable 
that it must have been at least 1 em. thick. The numerous leaf traces 
which traverse this region are now found to be much larger (fig. 1) than 
in the preceding zone, and to be more highly organized, partaking more 
of the character of the future stipes into which they lead than of 
simple leaf traces. 
Leaves.—Among the material submitted to me were fragments of 
several leaves and a few casts of an uncertain character. Among them 
all there were only two fragments which could, with any degree of cer- 
tainty, be regarded as having connection with the stems. From their 
general aspect it was assumed, provisionally, that they might represent 
‘ai 


ae 
=> | 
ne 
. 3.—OSMUNDITES SKIDEGATENSIS. X !/; 
) 
r 
the fronds of a fern of the type of Osmunda, in which case they must 
be held to be fragments of pinnæ of a doubly pinnate frond comparable 
with the fronds of Osmunda Claytoniana or O. cinnamomea. ‘The 
largest and most perfectly preserved (figure 3) was found to be 8 cm. 
long by 5:5 cm. wide at its greatest breadth. The pinnules are oblong, 
slightly scythe shaped, obtuse, and with entire (?) margins; they are 
8 mm. broad at the base and 2°5 cm. long, and there seems to be a 
possibility that they were confluent at the base, as in Osmunda 
Claytoniana. The whole specimen shows portions of fourteen pinnules 
only, while the rachis has been completely obliterated. The dimen- 
sions as given would show a rachis upwards of 5 mm. wide, which is 
