i56 HIXD : CAKBOXIFEROUS ROCKS OF THE PEXMNE SYSTEM. 
Since writing my paper a very interesting fact has been dis- 
covered, which shows that plants obey the same law. Mr. R. Kid- 
ston has determined some half-dozen specimens of plants, obtained 
by Mr. D. Tait, from the Pendleside Series of Pendle Hill as 
Asterocalamites scrobiculatus, 
Lepidodendron Veltheimianu m , 
both of which species occur in the Calciferous Sandstone Series of 
Fife, and apparently in that locality at that horizon only, and also 
a number of ferns from the Posidonormja beds of the Isle of Man, 
which he had never before met with above the Calciferous Sand- 
stone Series. 
Isodietic line for 
Nuculana at- 
tenuata, Nucula 
gibbosa, and 
Ctenodonfa 
Icavirosfris. 
Coal-Measures 
Millstone Grits 
Pendleside Grou£._ 
{Carboniferous Lime- 
stone 
Yoredales & Great 
Scar Limestone 
/ Calciferous Sand- 
l stone Series 
Fig. 2. 
It is a remarkable fact that plants which occur very low down 
in the Carboniferous sequence of Fife should also occur at a much 
higher horizon further south. It will be interesting to ascertain 
if they occur, and at what horizon in the intervening country. 
The fauna found in the Carboniferous Limestone massif is practi- 
cally identical with that which occurs in the Great Scar and Yore- 
dale Limestones. Some few species occur in the shales separating 
the limestones which have not been found in the limestone. A very 
