, 291, 295, 305, 307, ii. 20, 33, 34

"Newton of Natural History," the, i. 76

Newton, Prof. A., i. 105, ii. 8, 36

"Nicaragua," Belt's, ii. 36

Non-inheritance of acquired characters, ii. 44-5, 54, 70, 71, 72, 73;
Prof. Poulton's address on, 79

Norman, Dr., and Wallace, ii. 137

Norris, Dr. Richard, i. 244, ii. 136

---- Miss, ii. 136

"Norwegian Flora, Immigration of," Blytt's, i. 293

O

Oceanic islands, colonisation of, i. 132, 133, 138, 290;
flora of, 210-212, 305

Onomatopoeia, ii. 66

Orang-utans, i. 53, 56, 57, ii. 30

"Orchids," Darwin's, i. 143, 297

---- Wallace's admiration of, i. 23, ii. 114;
epiphytal, i. 23;
of the Azores, 311

"Origin of Species," Darwin's, i. 67, 72, 76-8, 112, 121, 124, 125,
129, 134, 136, 139, 141, 146, 164, 174, 176, 224, 240, 241,
244, 246, 264-5, 271, ii. 1, 2, 77;
reviews of, i. 142, 144

---- ---- (_see_ Selection)

"---- ---- and Genera," Wallace's, i. 304

"---- of the Fittest," Cope's, ii. 47

"---- of the Races of Man," Wallace's, ii. 18

Ornithoptera croesus, i. 41

---- poseidon, i. 42

Orr, Henry B., ii. 60

Osborn, Prof. H.F., on Wallace, ii. 239

Ostriches, Wallace on, i. 145;
Darwin on, 146-7

Owen, Sir R., Darwin's opinion of, i. 139;
attacks Darwin's theory, 142, 144, 157, 199

---- Robert, and Wallace, i. 15, ii. 139, 148, 182, 225

---- Robert Dale, ii. 225

P

Pacific Islands, land shells in, i. 133

Pain, Wallace on, ii. 244

Pangenesis, i. 196 _et seq._, 219, 220, 276, ii. 102

Panmixia, ii. 52, 53

Papilio, polymorphic species of, i. 168

---- sarpedon choredon, i. 316

"Papilionidae of the Malay Region," Wallace's, i. 153, ii. 4, 6, 231

Para, Wallace at, i. 26, 29;
products of, 27

Parrots, Wallace's paper on, i. 160, ii. 4

"Passerine Birds," Wallace's, ii. 231

Pastrana, Julia, i. 181

Patagonia, plains of, i. 32

"Permanence of Oceanic Basins," Wallace's, ii. 74

Permian period, i. 290

Perry, John, and Wallace national memorial, ii. 253

"Personal Narrative," Humboldt's, i. 17, 164, 238

Pheasants, Argus, i. 230, 289, 292

"Phenomena of Variation and Geographical Distribution," Wallace's, i. 153

Phillips' attack on Darwin's "Origin of Species," i. 142

Phrenology, Wallace's belief in, i. 24, ii. 237

"Physical Geography of the Malay Archipelago," Wallace's, ii. 232

"---- History of Man," Prichard's, i. 91, 116, ii. 73

"Physics of the Earth's Crust," F