BARK FLUTED AND SCARRED. 473 
The impressions, or scars, which formed the 
Articulations of leaves on the longitudinal flutings 
Af the trunks of Sigillarise, are disposed in ver- 
tical rows on the centre of each fluting from the 
top to the bottom of the trunk. Each of these 
Scars marks the place from which a leaf has 
tallen off, and exhibits usually two apertures, by 
"'hich bundles of vessels passed through the 
^Ark to connect the leaves with the axis of the 
tree. No leaf has yet been found attached to 
Any of these trunks ; we are therefore left entirely 
tn conjecture as to w'hat their nature may have 
tieen. This non-occurrence of a single leaf upon 
Any one of the many thousand trunks that have 
r^onae under observation, leads us to infer that 
every leaf was separated from its articulation. 
And that many of them perhaps, like the fleshy 
interior of the stems, had undergone decompo- 
sition, during the interval in which they were 
floating between their place of growth, and that 
of their final submersion. 
M. Ad. Brongniart enumerates forty-two species 
Af Sigillaria, and considers them to have been 
Nearly allied to arborescent Ferns, with leaves 
^nry small in proportion to the size of the stems. 
And differently disposed from those of any living 
^erns. He w'ould refer to these stems many of 
^flo numerous fern leaves of unknown species, 
’"'hich resemble those of existing arborescent 
Sonera of this family. Bindley and Hutton shew 
strong reasons for considering that Sigillarise 
