isd OF PLATES, 
PLATES I. to XV. 
Illustrative of Mr. Robert Mallet’s Report on the facts and theory of Earth- 
quake Phenomena. 
PLATES XVI. and XVII. 
Illustrative of Mr. R. H. Meade’s paper on some Points in the Anatomy of 
the Araneidea, or true Spiders, especially on the Internal Structure of 
their Spinning Organs, 157. 
PLATE XVIII. 
Illustrative of Mr. Stephen Eddy’s paper on the Lead Mining Districts of 
Yorkshire. 
PLATES XIX. and XX. 
Illustrative of Mr. R. Beckley’s description of a Self-recording Anemometer. 
