. TABLE OF CONTENTS. vii 



Page 



Johnston-Lavis, Dr. H. J. On the Physical Conditions involved 



in the Injection, Extrusion, and Cooling of Igneous Matter. ... 103 



KiDSTON, Robert, Esq. On the Relationship of Ulodendron, 

 Lindl. & Hutt.j to Lepidodendron, Sternb., Bothrodendron, Lindl. 

 & Hutt., Sigillaria, Brongn., and Rhytidodendron, Boulay .... 98 



Lendenfeld, Dr. R. von. On the Glacial Period in Australia .... 103 



Reade, T. Mellard, Esq. On Boulders wedged in the Falls of 

 the Oynfael, Ffestiniog 7 



Tomes, R. F., Esq. On some imperfectly known Madreporaria 



from the Cretaceous Formation of England m 



Vine, G. R., Esq. On the Polyzoa and Foraminifera of the Cam- 

 bridge Greensand loi 



