Index. 



641 



MONTE 



Monte Video, crystalline rocks of, 



431 

 Morris and Sharpe, Messrs., on the 



palaeozoic fossils of the Falk- 



lands, 440 

 Mud, Pampean, 315 



— long deposited on the same 

 area, 357 



Mud streams at the Galapagos 



Archipelago, 120 

 Murchison, Sir R., on cleavage, 461 



— on waves transporting gravel, 

 226 



— on origin of salt formations, 

 580 



— on the relations of metallif erous 

 veins and intrusive rocks, 584 



— on the absence of granite in the 

 Ural, 592 



NARBOROUGH Island, 117 

 Nautilus (POrbignyanus, 400, 

 407 

 Navidad, tertiary formations of, 



401 

 ■ — subsidence of, 418 

 Negro, Rio, pumice of pebbles of, 

 194 



— gravel of, 219 



— salt lakes of, 219 



— tertiary strata of, 370 

 Nelson, Lieut., on the Bermuda 



Islands, 162, 165 



New Caledonia, 141 



New Red Sandstone, cross cleavage 

 of, 151. 



New South Wales, 146 



New Zealand, 160 



North America, fossil remains of, 

 362 



North Wales, sloping terraces ab- 

 sent in, 295 



— bent cleavage of, 457 

 Nuevo Gulf, plains of, 197 



— tertiary formation of, 374 

 Nulliporce (fossil), resembling 



concretions, 6 



OBSIDIAN, bombs of, 44 

 — passage of beds into, 62, 66 



PATAGONIA 



Obsidian, composition and origin 

 of, 69, 73 



— streams of, 73 



— absent at the Galapagos Archi- 

 pelago, 129 



— crystals of feldspar sink in, 132 



— specific gravity of, 133, 137 



— its eruption from lofty craters, 

 J 37 



Olivine decomposed at St. Jago, 

 23 



— in the lavas at the Galapagos 

 Archipelago, 118 



— at Van Diemen's Land, 156 

 Ooliric structures of recent calca- 

 reous beds at St. Helena, 99 



Otaheite, 30 



Owen, Prof., on fossil mammif erous 

 remains, 322, 326, 336, 339, 346 



PALMER, Mr., on transportation 

 of gravel, 227 

 Pampas, elevation of, 211 



— earthquakes of, 211 



— formation of, 219, 313 



— localities in which fossil mam- 

 mif ers have been found, 367 



Panuncillo, mines of, 538 



Panza Island, laminated trachyte 



of, 74 

 Parana, Rio, elevation near, 191 



— on saline incrustations, 307 



— Pampean formation near, 331 



— on the S. Tandil, 434 



Parish, Sir W., on elevated shells 

 near Buenos Ayres, 191, 192 



— on earthquakes in the Pampas, 

 211 



— on fresh- water near salt lakes, 

 312 



— on origin of Pampean forma- 

 tion, 351 



Patagonia, elevation and plains of, 

 196 



— denudation of, 213 



— gravel formation of, 219 



— sea-cliffs of, 22S 



— subsidence during tertiary pe- 

 riod, 418 



— crystalline rocks of, 435 



