11 CONTENTS. 



PAGB 



Art. VI. On Changes of Level in the Pacific Ocean. By J. 



D. Dana, Esq., 240 



Evidences of Elevation, ..... 240 



Evidences of Subsidence, . . . . 240 



Probable evidence of Subsidence now in progress, 241 



Subsidences indicated by atolls and barrier reefs, 242 



Elevations of Modern Eras in the Pacific, . 258 



VII. On Some New Points in British Geology. By Pro- 

 fessor Edward Forbes, President of the Geologi- 

 cal Society. Communicated by the Author, . 263 



VIII. On the question whether Temperature determines the 

 distribution of Marine Species of Animals in depth. 

 By James D. Dana, Esq., .... 267 



IX. On the identity of a Colouring Matter present in 

 Animals with the Chlorophyle. By M. Max. 

 Schultze of Greifswald, . . . .271 



X. On the Classification of Rocks. By M. Dumont, . 272 



XI. Causes of Phosphorescence, . . . . 274 



XII. Dr Daubeny and Professor Bunsen of Heidelberg on 



Volcanoes, ....... 276 



XIII. On the Discovery and Analysis of a Medicinal Mineral 



Water at Helwan, near Cairo. (In a Letter to 

 Professor Jameson, from Leonard Horner, Esq., 

 F.R.S.L. & E., and F.G.S.), .... 284 



XIV. The Transition from Animals to Plants, . . 290 



XV. A few Remarks on Currents in the Arctic Seas. By 



P. C. Sutherland, M.D., . . . .292 



XVI. Recent Researches of Professor Agassiz, . . 295 



