276 Ber ridge.' —On Two Neiv Specimens of Spencerites insignis. 
The course of the leaf-trace is considerably arched just before it enters 
the pedicel (Phot. 9). In certain cross-sections, therefore, the same leaf-trace 
appears twice, as is the case in Phot, jo (/./., l.t .), giving the appearance of 
superposed whorls. The traces of each whorl of sporophylls are inserted 
on the woody cylinder at the level of the whorl next below. 
Sporophylls and Sporangia. Some of the sporophylls of the new cones 
are exceptionally well preserved, and good radial sections have been 
obtained of them. 
These show that the sporophyll consists of a narrow pedicel, from 
about 2*5 to 3 mm. long, carrying an upturned lamina with a broad fleshy 
base. The base is prolonged into a thick dorsal lobe below and a larger 
ventral lobe above, the latter bearing the sporangium. In all previously 
known sections the lamina has disappeared, leaving only the base with its 
two lobes, which gave the appearance of a peltate sporophyll-head. The 
true form of the sporophyll is 
Fig. 4. Portion of sporangium-wall 
(sp. w.) in continuity with some cells of the 
sporangial attachment (sp. at.). 
represented somewhat diagrammatically 
in Fig. 3 ; the two examples photo- 
graphed (Phots. 3 and 4) contributing 
the main features to the diagram. 
The structure of the pedicel, which 
has been fully described in Dr. Scott’s 
paper, is clearly shown in the cross- 
sections of it which appear in photo- 
graph 7. 
The ventral lobe is usually the best 
preserved portion of the sporophyll- 
head. It consists of elongated, some- 
what thick-walled cells, and bears a 
cushion of small delicate cells to which 
the sporangium was attached. This 
elliptical disc of small cells forms a 
conspicuous object in several of the 
slides, especially in cases such as that 
represented in photograph 8, where it is 
cut by a section passing more or less 
parallel to the adaxial surface of the 
ventral lobe. This section shows that 
mm. and its vertical breadth about 
its horizontal width is about *5 
•3 mm. 
In the two cones the sporangium has not been found attached to the 
lamina, but the sporangium-wall is sometimes continuous with a few small 
isodiametric cells similar to those of the cushion on the ventral lobe (Fig. 4) ; 
the wall appears frequently to have ruptured at the place of attachment. 
The distal limb of the sporophyll is best shown in photograph 4 ; in 
