Index. 



PATTINSON 



Pattinson, Mr., on the separation 



of lead and silver, 134 

 Paul's, St., rocks of, 36 

 Payta, tertiary formations of, 405 

 Pearlstone, 68 

 Pebbles of pumice, 194 



— decrease in size on the coast of 

 Patagonia, 215 



— means of transportation, 225 



— encrusted with living corallines, 

 226 



— distribution of, at the eastern 

 foot of Cordillera, 289 



— dispersal of, in the Pampas, 318 



— zoned with colour, 472 

 Pentland, Mr., on heights in the 



Cordillera, 503 



— on fossils of the Cordillera, 511 

 Peperino, 113 



Pernambuco, 193, 425 



Peron, M., on calcareous rocks of 

 Australia, 164, 165 



Peru, tertiary formations of, 405 



Peuquenes, Pass of, in the Cor- 

 dillera, 481 



— ridge of, 488 



Pholas, elevated shells of, 233 

 Phonolite, hills of, 21, 27, 96 



— laminated, 75 



— with more fusible hornblende, 

 137 



Pitchstone, 66 



— dikes of, 75 



— of Chiloe, 391 



— of Port Desire, 435 



— near Cauquenes, 480 



— lavers of, in the Uspallata range, 

 523, 524 



— of Los Hornos, 538 



— of Coquimbo, 543 

 Plains of Patagonia, 197, 211 



— of Chiloe, 235 



— of Chile, 283 



— of Uspallata, 286 



— on eastern foot of Cordillera, 

 2SS 



— of Iquique, 304 

 Plants extinct, 157 

 Plata, La, elevation of, 190 



— tertiary formation of, 218, 316 



— crystalline rocks of, 428 



PUNTA 



Playfair, Prof., on the transporta- 

 tion of gravel, 226 



Pluclaro, axis of, 542 



Plutonic rocks, separation of con- 

 stituent parts of, by gravity, 137 



Pondichery, fossils of, 400 



Porcelain rocks of Port Desire, 

 437 



— of the Uspallata range, 522, 

 525, 530 



Porphyry, pebbles of, strewed over 



Patagonia, 221 

 Porphyry-claystone of Chiloe, 392 



of Patagonia, 435 



of Chile, 471, 476 



— greenstone, of Chile, 475 



— doubly columnar, 481 



— claystone rare, on the eastern 

 side of the Portillo Pass, 493 



— brick-red and orthitic, of Cum- 

 bre Pass, 499, 514 



— intrusive, repeatedly injected, 

 514 



— claystone of the Uspallata range, 

 516 



of Copiapo, 553, 570 



eruptive sources of, 575 



Port Desire, elevation and plains 

 of, 198 



— tertiary formation of, 373 



— porphyries of, 436 



Portillo Pass in the Cordillera, 481 

 Portillo chain, 491, 499 



— compared with that of the Us- 

 pallata, 534 



Porto Praya, 3 



Preril or sea-wall of Valparaiso, 



245 

 Prevost, M. C, on rarity of great 



dislocations in volcanic islands, 



89 

 Producta, 176 



Prosperous Hill, St. Helena, 90 

 Puente del Inca, section of, 505 

 Pumice, laminated, 74, 75, 77 



— absent at the Galapagos Archi- 

 pelago, 129 



— pebbles of, 195 



— conglomerate of, E. Negro, 370 



— hills of, in the Cordillera, 480 

 Punta Alta, elevation of, 193 



