18 ROYAL SOCIETY OF CANADA 
Feet. 
“ Dadoxylon Sandstone below the horizon of Pseudobaiera 
and ite Associates DO EME ARE RER RUE 88 
Dadoxylon Sandstone including the seams carrying these 
plantés AE RAM RGO a 12 
Dadoxylon Sandstone above these beds.............. 200 
Lower Cordaite Shales, part containing Hartt’s plant beds_ 140 
440 
The new material shows variation in several respects. One fine 
pinna shows evidence of a more generous growth than was noted in 
those first observed, as the pinnules are placed three quarters of an inch 
apart on each side of the rachis. But on the other hand there are sheafs 
of narrow leaves that appear to have sprung from the sides of stout 
stems; these in size show a deviation from those first examined, and are 
either growths from running root stocks, or are of the nature of Aphebiæ. 
The typical pinnules. of this species appear to have been somewhat 
clasping on the rachis, unless this appearance is due to the strong leaf- 
strands that spring from the centre of the rachis; the rachis is channelled 
on the upper side. A short way above the base of the main sheaf of 
the pinnule a lateral lobe sets off on the inferior side of the pinnule; 
but the rest of this sheaf runs forward from a narrow base strongly ribbed, 
spreading, and forking as it goes into about five main divisions which 
have broad mucronate ends. 
Some specimens were observed which may show phases of the 
fruiting pinne differing from those first described, though it is not 
quite certain that they belong to this plant as they do not have the 
two vegetative pinnules preserved at the base which mark those first 
observed. One example shows a pair of thick and substantial seed 
vessels attached by a stem of their own length to a stout rachis. The 
rachis is wider than that of the vegetative stem of Pseudobiera; other 
obscure fruits are visible higher up on this rachis. 
Beside this object another pair of stemlets are present; these bear 
lance-oval objects placed alternately on the sides, which possibly were 
male-organs of this species. The substance of these objects was much 
thinner than that of the pod-like organs and has left but a faint im- 
pression on the shale. 
The study of this plant with its parts and associations, its thick 
leathery leaves, its pod-like fruit and other Cycado-filicene characters 
would incline one to class it with the Pteridosperms. 
For description of plate see page 21. 
