• ————————— on coral-reefs, 476

• Rabbit, wild, at the Falkland Islands, 193
• Rain at Coquimbo, 338, 347, 348
• —— at Rio, 29
• —— and earthquakes, 351
• —— in Peru, 364, 365
• —— in Chile, formerly more abundant, 357
• ——————, effects on vegetation, 338
• Rana Mascariensis, 382
• Rat, only aboriginal animal of New Zealand, 427
• Rats at Galapagos, 378
• —— at Ascension, 492
• —— at Keeling Island, 456
• Rattle-snake, species with allied habit, 97
• Red snow, 322
• Reduvius, 330
• Reef at Pernambuco of sandstone, 498

Reefs of coral, 465 to 482

• ———, Barrier, 469, 476
• ———, Fringing, 472

Reeks, Mr., analysis of salt, 66

• —————————— bones, 155
• —————————— salt and shells, 370
• Remains, human elevated, 370
• Remedies of the Gauchos, 128
• Rengger on the horse, 233
• Reptiles absent in Tierra del Fuego, 237
• ——— at Galapagos, 381
• Respiration difficult in Andes, 322
• Retrospect, 50
• Revolutions at Buenos Ayres, 140
• Rhinoceroses live in desert countries, 86
• ——————, frozen, 89, 250
• Rhynchops nigra, 137
• Richardson, Dr., on mice of North America, 378
• ———————, on polished rocks, 251
• ———————, on frozen soil, 88, 248
• ———————, on eating fat, 117
• Richardson, Dr., on geographical distribution, 131
• Rimsky atoll, 466
• Rio de Janeiro, 19
• ——— Plata, 39
• ——— Negro, 63, 149
• ——— Colorado, 70
• ——— S. Cruz, 177
• ——— Sauce, 106
• ——— Salado, 118
• Rivers, power of, in wearing channels, 180, 320
• River-bed, arched, 358
• River-courses dry in America, 107
• Rocks burnished with ferruginous matter, 12
• Rodents, number of in America, 49, 179
• ———, fossil species of, 82
• Rosas, General, 71, 103, 140
• Ruins of Callao, 369
• ——— of Indian buildings in Cordillera, 356, 368

• S. Cruz, 177
• Salado, Rio, 118
• Salinas at the Galapagos Archipelago, 377
• ——— in Patagonia, 65, 170
• Saline efflorescences, 78
• Salt with vegetable food, 110
• ——, superficial crust of, 364
• ——, with elevated shells, 369
• Salt-lakes, 65, 170, 377
• Sandwich Archipelago, no frogs at, 382
• ———— Land, 248
• San Pedro, forests of, 281
• Sand-dunes, 75
• Sand, hot from sun's rays, at Galapagos Archipelago, 377
• ——, noise from friction of, 361
• Sandstone of New South Wales, 437
• —————, reef of, 498
• Santa Cruz, river of, 177
• Santiago, Chile, 262
• Sarmiento, Mount, 233, 241
• Sauce, Rio, 106
• Saurophagus sulphureus, 54
• Scarus eating corals, 464
• Scelidotherium, 82
• Scenery of Andes, 318
• Scissor-tail, 138
• Scissor-beak, habits of, 137