420 
ing, that the verticilli are nearer to each other, than in the plants with 
. which it has been compared. This specimen is an iron-stone, the 
fractured surface being of a rusty colour. Fig. 4, of the same Plate, 
is a micaceous sand-stone, bearing a delicate, but very perfect and 
beautiful, impression of a leaf, which, bearing no peculiar character- 
istic marks, cannot be referred to any particular plant. Fig. 5, of 
the same Plate, represents the leaf of some plant, entirely unknown, 
in an iron-stone nodule. The kind represented Fig. 9, of the same 
Plate, on a coal schist from Wales, very much resembles the speci- 
men figured Tab. III. Fig. ^ , of Scheuchzer’s Diluvian Herbarium, 
p. 19 ; of which he says, “ baud abludit Filix non ramosa major, 
pinnulis longis angustis, profunde dentatis, suprema pinna longius 
mucronata.” Pluk. Amalth. Botan. p. 93. tab. 403. Fig. 10, is 
the remains, little more than the stalk appearing, of, perhaps, an 
Equisetum, in an iron-stone, of a red colour, from Coalbrook-dale, 
in Shropshire. Fig. 11 is also from Coalbrook-dale, and is in an 
iron-stone of the same colour with the former. It contains a plant 
probably of the same genus also : the fossil described by Lhwydd, 
at No. 202, approaches near to it. This he describes as Aparin® 
densius foliate ®mulum Lithophyton radiosum. E fodinis Glamor- 
gensis. The plants in both these specimens appear to be unnaturally 
contracted or shrunk. Whether this appearance proceeds from the 
direction in which the leaves are placed, presenting little more than 
their edges, I cannot determine : both specimens, however, may owe 
their colour to the action of fire, to which they may have been ex- 
posed. Fig. 8, of the same Plate, represents one of these impressions 
of schisti, already mentioned, as described by Dr. Woodward, from 
the coal mines of Haigh, in Lancashire. 
Mr. Da Costa, in a paper on the impressions of plants on the 
slates of coals (schistus terrestris niger carhonarim) , found immedi- 
ately on the coal stratum, not only of this kingdom, but in France, 
Saxony, Bohemia, Silesia, &c. conjectures that they are impressions, 
