Fig. 2. — Microscopic Section of Radiolarian Rock, showing casts of 

 JRacliolaria. From the Lower Culm Measures at Ramshorn 

 Down, near Bovey Tracer/, S.E. Devon. From a photograph taken 

 by Mr. J. J. H. Teall, F.R.S. (Enlarged about 35 diameters.) 



Fig. 3. — Microscopic Section of Radiolarian Rock, showing Radio- 

 larian casts and a cube of pyrites {the dark spot). From the 

 Lower Culm Measures at Carzantic Quarry, near Launceston, 

 Cornwall. From a photograph taken by Mr. J. J. H. Teall, 

 F.R.S. (Enlarged about 32 diameters.) 



