Ber ridge. — On Two New Specimens of Spencerites insignis. 275 
delicate thin-walled tissue, which, however, shows no trace of the trabecular 
character of the middle cortex as preserved in certain specimens in the 
Williamson collection (Phot. 10). 
It is evident from the position of the leaf-traces both in the transverse 
(Fig. 2) and tangential sections (Phot. 2) of the axis, that the sporophylls 
were arranged in alternating verticils, each whorl consisting of ten sporo- 
phylls. Dr. Scott has mentioned this as a probable arrangement in his paper 
Fig. 3. Diagram showing the probable form of the sporophylls, with one sporangium. 
distal limb ; v.l., ventral lobe ; d.L, dorsal lobe ; sp ., sporangium ; sp.a., sporangial attachment ; -bed., 
pedicel ; Id., leaf-trace. 
‘ On Spencerites / and pointed out to me the clear evidence regarding this 
character furnished by the new slides. He nevertheless considers the 
phyllotaxy as somewhat variable, being sometimes spiral and sometimes 
verticillate. Such variability is often present among recent Lycopods ; in 
‘ Die natlirlichen Pflanzenfamilien 5 it is mentioned that both a spiral and 
whorled arrangement of the leaves is frequently to be found at different 
levels on the same shoot ; this is markedly the case in L. Selago. 
The whorled arrangement is also evident in Phot. 7, a tangential section 
of the other specimen, passing through the pedicels of the sporophylls. 
