TndeA-. 407 



Medusae, their supposed stinging organs considered, by Professoi" 

 Rudolph Wagner, 80. 



Metaxytherium, account of skeleton of, 173. 



Miasmata, tropical, observations on, 27- 



Milne, David, Esq., F.R.S.E., &c., on earthquakes felt in Great 

 Britain, 106, 362. 



Morren, A., the influence of light, and the green-coloured substance 

 in stagnant water, on the quality of the gases in the latter, 180. 



Murchison, R. I., Esq., President of the Geological Society, his 

 letter to M. Fischer de Waldheim, containing some of the re- 

 sults of his second geological survey of Russia, 99. 



Musca, a species of, considered with the view of illustrating the his- 

 tory of metamorphoses, and the pretended circulation of insects, 

 by Leon Dufour, 127. 



Musical instrument, new kind, described, 199. 



Phosphorescence of zoophytes, by the Rev. D. Landsborough, 169. 



Pekin, general view of its g'eology, by Major Kovanko, 242. 



Pycnogonidse, several new species described and figured, by Henry 

 D. S. Goodsir, 136. 



Robison, Sir John, his description of a new I'oofing tile, 390. 



Ross, Capt. James, F.R.S., his notice of the magnetometric, geogra- 

 phical, hydrographical, and geological observations and dis- 

 coveries made by the expedition under his command, 285. 



Scoresby, Dr, his paper on the Dew-drop examined, by Professor 

 Forbes, 391. 



Serpents, their general motions described by M. Dumeril, 235. 



Society, Wernerian Natural History, its proceedings, 185, 400 — 

 Geological, its proceedings, 185 — of Arts, its proceedings, 189. 



Sound, its propagation through water, illustrated by Mr CoUadon, 91. 



Sugar-cane, cultivation of in Spain, by T. S. Traill, M.D., &c.. 256. 



Steffens, Henry, Professor, notice of his geological writings, 355. 



Stevenson, Alan, civil engineer, F.R.S.E., &c., notice of experiments 

 regarding the visibility of lights in rapid motion, with a view 

 to the improvement of lighthouses, and of some peculiarities 

 in the impressions made by them on the eye, 270. 



Stevenson, David, Esq., civil engineer, his hydrometrical observa- 

 tions, 382. 



Tin ore, observations on its deposition, composition, and origin, 154. 

 Traill, Professor, on the baryto-sulphato of Glen Sannox in Arian, 

 139. 



, on the cultivation of the sugar-cane in Spain, 256. 



Water, its freezing, remarks on, 198. 

 Werner, of Freiln-rL^, rcminis'-enccs of, .137. 



