jjrg THE FAIRY-LAND OF SCIENCE. 
lery and look up at the roof, and with them there will 
be others with spotted stems, or with stems having a 
curious diamond pattern upon them, and many ferns 
of various kinds. 
Next look down at your feet and examine the floor. 
FIG. 49. A piece of shale with impressions of ferns and Cala- 
mite stems. 
You will not have to search long before you will al- 
most certainly find a piece of stone like that repre- 
FIG. 50. Stigmaria root or underground stem of Sigillaria. 
sented in Fig. 50, which has also come from Neath 
Colliery.* This fossil, which is the cast of a piece of a 
* I am much indebted to Mr. John Williams, of Neath, for 
procuring these fossils for me ; and also to Professor Judd for 
lending me some for an earlier lecture. 
