INDEX. 



91 



3e Beaumont, M. Elie, objections to the 

 theory of, 341 



on modern granite of the Alps, 358 



De Candolle on the longevity of trees, 99 

 De la Beche, Mr., on M. Elie de Beau- 

 mont's theory, 347 



Delta, of the Niger, size of the, 329 



of the Nile, preyed on by currents, 28 



of Rhone, in lake of Geneva, 27 



De Luc, on the deluge, 271 



Deluge, on thechanges caused by the, 270 



M. Elie Beaumont, on the cause 



of the historical, 148 

 Denudation, effects of, 30, 32 



of the Valley of the Weald, 285 



Deposition, sedimentary, shifting of the 



areas of, 2P> 

 Descartes, 97 

 Deshayes, M., his comparison of the fossil 



shells of Touraine, S. E. of France, 



Piedmont and Vienna, 21 



his tables of fossil shells, 49 see 



Appendix I. 



- on the shells of the Val di Noto, 

 series, 65, 67 



on shells of the sub-Etnean beds, 79 



on the fossil shells of Ischia, 126 



on the fossil shells of the Antilles, 



133 

 on the fresh-water shells of Colle, 



138 



on the fossil shells of the Crag, 171 



on the limestone of Blaye, 208 



on the fossil shells of Volhynia and 



Podolia, 215 



on the fossil shells of Hungary, 223 



' on the abundance of Cerithia in the 



Paris basin, 245 

 on the changes which the Cardium 



porulosum underwent during its exist- 

 ence in the Paris basin, 250 

 on the microscopic shells of the Paris 



basin, 251 

 on the fossil shells of the Nether. 



lands, 276 

 on the number of shells common 



to the Maestricht beds, chalk, and upper 



green sand, 325 

 on the distinctness of the secondary 



and tertiary fossil shells, 327 

 on the secondary fossil shells of 



the Pyrenees, 343 



Desmoulins, M. Ch., on the Eocene depo- 

 sits of the environs of Bordeaux, 209 

 Desnoyers, M., on the organic remains of 



the Faluns, 205 

 on the tertiary formations of Ton- 



raine, 20, 203 

 on the resemblance of the English 



Crag and the Faluns of the Loire, 

 : 204 



Desnoyers, M., on the fossil organic re- 

 mains of the Orleanais, 219 



on the alternation of the plastic 



clay and calcaire grossier in the Paris 

 basin, 244 



on the tertiary formations of the Co- 

 tentin, 276 



on the marine tertiary strata near 



Rennes, 276 



Devil's-dyke, view of the chalk escarp- 

 ment of the South Downs, taken 

 from the see wood-cut No. 65, 290 



Diagonal stratification of the Crag strata 

 see wood-cuts, 174, 175 



cause of this arrangement, 176 



Dikes, intersecting limestone, 69 



traversing peperino near Palagonia, 



see diagrams Nos. 6 and 7, 69 



on the summit of the lime-stone 



platform, Val di Noto, 70 



off tuff or peperino, how formed. 



70 



changes caused in argillaceous strata 



by, 70 



on Etna, their form, origin, and com- 

 position, 90 



at the base of the Serra del Solfizio 



see wood-cut, No. 19, 90 



changes caused by, in the escarp- 

 ment of Somma, 91 



in the Val del Bove, as seen from 



the summit of Etna see wood-cut No. 

 22,93 



some caused by the filling up of 



fissures by lava, 122, 123 



of Somma see wood-cut No. 25, 



122 



cause of the parallelism of their op- 

 posite sides, 122 



varieties in their texture, 124 



volcanic, in Madeira, 134 



strata altered by, 368 



Diluvial theories, 270 



Diluvial waves, whether there are signs of 



their occurrence on Etna, 101 



no signs of, in Campania, 128 



Dip and direction of the tertiary strata of 



Sicily, 73 

 of the marine strata at the foot of 



Etna, 78 

 Dominica, alternations of coral and lava 



in, 133 



Dorsetshire, valleys of elevation in, 308 

 Dorsetshire and Cambridgeshire, great line 



of chalk escarpment between, 315 

 Doue, M. Bertrand de, on the fossil mam- 



miferous remains of Velay, 219 

 on the lacustrine deposits of Velay, 



235, 236 



on the igneous rocks of Velay, 



262 



