323 



Siluius, habits of, i., 174. 

 Skuuks, i., 103. 

 Slavery, i., 24, 30, ii., 302. 

 Snake, veuomous, i., 123. 

 Snow-line on Cordillera, i., 315. 

 Snow, effects of on rocks, ii., 67. 



, prismatic structure of, ii., 75. 



, red, ii., 73. 



Society, state of, in La Plata, i., 52. 



, state of, in Australia, ii., 231. 



Archipelago, ii., 177. 



Soda, nitrate of, ii., 125. 



, sulphate of, i., 100. 



Soil, frozen, i., 113, 319. 

 Spawn on surface of sea, i., 21. 

 Species, distribution of, i., 167. 



, extinction of, i., 224. 



Spiders, habits of, i., 45-48. 



• , gossamer, i., 204. 



■ on Keeling Island, ii., 247. 



on St. Paul's, i., 13. 



Springs, hot, i., 339. 

 Stinging animals, ii., 285. 

 St. Helena, ii., 285. 



— Fe, i., 164. 



— Jago, Chile, i., 338. 



— Maria, elevated, ii., 53, 56. 



— Paul's rocks, i., 10. 

 Stones, perforated, i., 190, 345. 



transported in roots, ii., 254. 



Storm, i., 279, ii., 18. 



in Cordillera, ii., 74, 122. 



Streams of stones at Falkland Isl- 

 ands, i., 253. 

 Strongylus, i., 41. 

 Struthio Rhea, i., 54, 114. 



Darwinii, i., 119. 



Strzelecki, Count, ii., 237. 



Suadiva atoll, ii., 261. 



Subsidence of coral reefs, i., 262-281 . 



of Keeling Island, ii., 272. 



of Patagonia, i., 221. 



of coast of Peru, ii., 133. 



of Cordillera, ii., 70, 86. 



ofcoastsofChile,ii.,101. 



of Vanikoro, ii., 272. 



Sulphate of lime, i., 84, 219, ii., 134. 

 Swaiuson, Mr., on cuckoos, i., 67. 

 Sydney, ii., 215. 



Tabanus, i., 218. 

 Tahiti (Otaheite), ii., 177. 

 Talcahuano, ii., 46. 

 Tambillos, Ruinas de, ii., 116. 

 Tameness of birds, ii., 172. 

 Tapacolo and Turco, i., 348, 349. 

 Tarn, Mount, i.,301. 

 Tasmania, ii., 235. 

 Tattooing, ii., 179, 180, 206, 200. 



Temperance of the Tahitians, ii.,189. 

 Temperature of Tierra del Fuego 



and Falkland Islands, i., 312. 



of Galapagos, ii., 139. 



Tercero, Rio, fossils, i., 162. 

 Terraces of Cordillera, ii., 63. 



of Coquimbo, ii., 99. 



of Patagonia, i., 220, 232. 



Tertiary formations of the Pampas, 



i., 104, 164, 199. 



of Patagonia, i., 



219, ii., 81. 



I Chile, epochs 



of, ii., 101. 



Teru-tero, habits of, i., 146. 



Testudo, habits of, ii., 151, 166, 167. 



Theory of lagoon-islands, ii., 269. 



Theristicus, i., 212. 



Thistle-beds, i., 153, 157, 189. 



Thunder-storms, i., 79. 



Tierra del Fuego, i., 262-324. 



, climate and vege- 

 tation of, i., 312. 



zoology of, i., 304. 



, entomology of, 



306, 307. 

 Tinamus rufescens, i., 144. 

 Tiuochorus Eschscholtzii, i. 120. 

 Toad, habits of, i., 124. 

 Torrents in Cordillera, ii., 64, 71. 

 Tortoise, habits of, ii., 151, 166, 167. 

 To.\odon, i., 105, 162, 165, 198. 

 Transparency of air in Andes, ii., 77. 



in St. Jago, i., 5. 



Transport of seeds, li., 165, 245. 



of boulders, i., 240, 318. 



of stones, ii., 254. 



of fragments of rock on 



banks of the St. Cruz River, i., 233. 

 Travertin with leaves of trees. Van 



Diemen's Land, ii., 237. 

 Tree-ferns, southern limits of, i., 314. 



ii., 238. 



Trees, absence of, in Pampas, i.,58. 



, sihcified, vertical, ii., 85. 



, size of, 11., 112. 



, time required to rot, ii., 45. 



Tres Montes, ii., 19. 

 Trichodesmium, i., 18. 

 Trigonocephalus, i., 123. 

 Tristan d'Acunha, ii., 175, 247. 

 Trochilus, i., 350. 

 Tropical scenery, ii., 297. 

 Tschudi, M., on subsidence, ii., 134. 

 Tubes, siliceous, formed by light- 



nmg, i., 76. 

 Tucutuco, habits of, i., 64. 



, fossil species of, i., 105. 



TuflF, craters of, ii., 139. 



