Ber ridge. — On Two Neiv Specimens of Spencer it es insignis. 277 
this example the dorsal lobe is considerably decayed. The vascular bundle, 
which is clearly shown in photograph 3, runs from the pedicel into the 
lamina, and can, in several cases, be traced passing up it for a considerable 
distance. It is noteworthy that no branch has been observed passing to 
the ventral lobe and sporangium. 
The surface of the cone was probably completely covered by the 
leaf-like laminae of the sporophylls, as those of each whorl extended at 
least to the level of the third whorl above. The broad base of the distal 
limb, where it joins the ventral lobe, appears to have been the widest 
part of the sporophyll. Unfortunately this width cannot be measured 
directly, owing to the lack of good cross-sections of the sporophyll- 
head. From determinations of the circumference of the new cones, and 
the distance between adjacent whorls, it is evident that each sporophyll- 
head, exclusive of the lamina, occupied a rhomboidal area about 3*7 mm. 
in width by 2*3 mm. in breadth. It may therefore, I think, be assumed 
that the ratio of the tangential width of the head to its vertical height, 
measured through the ventral and dorsal lobes, was about 3 : 2. The same 
measurements were applied to some of the examples in the Williamson 
Collection ; these were not very definite, as the sporophylls are always 
considerably decayed, but they seemed to indicate that in these cases 
the tangential width was more nearly equal to the vertical height of the 
sporophyll head, the ratio being about 4: 3. 
Spores . The characteristic spores are well preserved, particularly 
in one of the cones. 
In no case has any reticulum been found similar to that apparent 
in some of the spores in the slides of the Williamson Collection. 
A few sporules occur within the sporangia similar to those described by 
Dr. Scott, but only two have been observed within the spore. 
Summary. 
The relationship of this family to other genera among the Palaeozoic 
Lycopods, as outlined by Dr. Scott in his paper, is practically unaffected by 
the facts brought to light by the examination of the new specimens. The 
presence of a sporophyll with a leaf-like lamina emphasizes the relationship 
to the Lepidostrohi and to M. Zeiller’s Sigillariostrobus Crepini , but the 
attachment of the sporangium to the sporophyll-head above its junction 
with the pedicel is a character which separates it definitely from the 
former genus. Besides other points of difference, such as the structure 
of the sporangial wall and of the spores, and also the arrangement of 
the leaf-traces, Spencerites appears to differ from the Lepidostrohi in 
having no ligule, no trace of it having been found, although well-preserved 
