"Flora of Australia," 139;
on pangenesis, 197;
visits Darwin at Freshwater, 219;
signs memorial to City Corporation in Wallace's favour, 303;
opinion on Wallace's "Island Life," 307

----, Sir Joseph, letters from:
on "Island Life," ii. 32-3;
acknowledging Wallace's "Life," etc., 82-3

Hopkins's review of the "Origin of Species," i. 144

Hopkinson, Prof. A., and Spiritualism, ii. 200

Howorth, Sir H.H., on subsidence and elevation of land, i. 277

Hubrecht, Prof., ii. 80;
alleges differences between Darwin and Wallace, 87

Hudson's "Scientific Demonstration of a Future Life," ii. 203

Huggins, Sir W., and psychical research, ii. 198, 199

Hughes, Hugh Price, Wallace's opinion of, ii. 204

---- letter from, on Wallace's "Justice, not Charity," ii. 157

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

Humming-birds, ii. 23, 24

Huxley, T.H., i. 1, 5, 76, 116, 137;
meets Wallace, 35;
appreciation of Wallace, 94;
first interview with Darwin, 104;
and Herbert Spencer, 123;
and the memorial to Gladstone as to a pension for Wallace, 313;
and psychical research, ii. 198;
opinion as to Wallace joining Royal Society, 220;
on Henslow, 251

---- letters from, declining Wallace's invitation to investigate
"curious phenomena," ii. 187-8

Hybrids, sterility of, i. 130, 195 _et seq._;
and Natural Selection, 195 _et seq._;
infertility of, 297

Hyder, Mr. J., ii. 161, 252

Hyndman, Mr. H.M., letter from, acknowledging Wallace's birthday
congratulations, ii. 164

I

"Ice-Marks in North Wales," Wallace's, i. 177

"Illustrations of British Insects," i. 23 (note)

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

Immortality, Wallace's views on, ii. 176

Indian Mutiny, i. 68

Indians, American, Bates's opinion of, ii. 29

Individual adaptability and natural selection, ii. 55

"Insectivorous Plants," Darwin's, i. 284, 285, ii. 2

Insects, migration of, Lyell on, ii. 19;
theory of flight, 26

Instinct, Archdall Reid's views of, ii. 67

"---- in Man and Animals," Wallace's, ii. 6

"Introduction to Study of Natural Philosophy," Herschel's, i. 17

"Is Mars Habitable?" Wallace's, ii. 172

"Island Life," Wallace's, i. 42, 305, 306-7, ii. 5, 12-14, 32, 33, 72, 75

Islands, continental, i. 305, ii. 12

---- oceanic, i. 138, 210-12, 305, ii. 12

J

Jameson's lectures on geology and zoology in Edinburgh, i. 16

Janet's "Materialism of the Present Day," i