81 
feet over the coal, the only chance of getting specimens is 
when a fall occurs, or when, for some special purpose, a portion 
of a road is required above the usual height. 
Passing over several seams of coal as yet little worked, we 
come to the Toad Vein, 172 yards above the Great Vein, 
but the name, Sigillaria seam, would be more appropriate, from 
the great abundance of this genus in the roof, together with 
unusual quantities of Cordaites. Of the Sigillaria, 2 or 3 species 
are characteristic, and are not found out of it. The one most 
numerous is imperfectly figured by Linpiry anp Hurron, on 
p- 55 of their book as a variety of pachyderma, but it has 
peculiarities which entitle it to be described as a new species, 
and it will shortly be described as Sigillaria Htheridgit, after 
Mr. Rozsert Erueriper, F.R.S8., being formerly one of his 
students. One feature of the Fossil is the detachment of the 
ribs in some specimens found, and the same is noticeable 
in the other characteristic, but much less numerous species, 
S. Monostachya. Thad considered my specimens to be those of 
a new species, but Mr. Carruruers, who kindly examined them, 
considers them to be the true form of the above species, figured 
by Liyptzy anp Hourron on page 72 loc. cit. These authors 
have only figured one rib, and remarking upon the peculiarity, 
they say, “this is so like a single rib or fluting of the Sigillaria 
that it is difficult to believe it can be anything else, and yet 
it is as difficult to understand how one longitudinal portion of 
Sigillaria should be separated from another in the way this one 
has been separated; for not only is there not the smallest trace 
of tearing, but the whole specimen stands out in very high relief.” 
The other species of Sigillaria found over the Toad Vein are 
scutellata, tesselata, and Murchisone and one other which I have 
been unable to determine; less numerous than the Sigillaria 
are Haloniatortuosa, Lepidodendron rimosum, Calamites undulatus, 
Sphenopteris obtusiloba and irregularis, Newropteris gigantea and 
(strange as it may appear to some) Stigmaria. It will be observed 
that the Flora of this seam is very different from the two before. 
Ulodendron Lindleyanwm, Lepidodendron Sternbergvi and Calamites 
ramosus having now disappeared. 
