326 LYCOPODIACEOUS PLANTS FROM THE NORTH OF SCOTLAND. 
densely covering the stem said lower branches, few or entirely absent 
on the upper branches. 
The only British species may be thus characterised :— 
Psilophyton Dechenian mum, Carr. Lower branches short and 
frequestly branching, giving the plant an oblong circumscrip- 
tion 
1841. —‘Fucoid,” Hugh it 
1847.—Haliserites Dechenian 8, Gop 
1857.—Lepidodendron ithe Salter (non Ung.). 
Lyecopodites Miller, Sal 
I have seiered to Salter’s Cotri © Peachit : the examina- 
tion of the original specimen, which is rmyn Street Museum, 
inclines me = ‘elias that it may be - "nade of a large plant 
allied to P. robustius. of Dawson, with which it agrees in the external 
aspect of the stem and in the manner of branching. 
served, the nature of which is not easy to determine. It t appears to 
be broken from the branch immediately pies it. The body itself 
ooks like a compound spike. From the opposite sides of the stalk 
spring several erecto-patent, at length incurved, leaf-like bodies. They 
were obviously a acranee spirally on the main axis, their opposite 
d 
0 
short thickened processes on the main axis, or on the curved leaf-like 
bodies. About halfway up the inner curve of the lowest ee eee such 
a process is shown with the linear bodies radiating from A large 
number of such cushions exist, scattered apparently without order on 
both the main axis and the lanc eolate branches, for though leaf-like 
they can be of course neither leaves nor bracts. The whole head must 
have been a somewhat compact structure, showing extern 
ssneneiane gg branches partly enclosing the numerous masses of 
es. 
+ £an see no intelligent interpretation of this interesting specimen. 
The linear bodies are too unlike the leaves to suppose this to be a 
is : 
have yet figured it, as any addition to so ancient and little known a 
flora » oe of the Caithness flagstones of middle Old Red Sandstone 
“ge 18 Important, and this notice and figure may secure further 
