INDEX 



473 



Graft-hybrids, experiments on, i. 280 ; 



of Cytisits, ii. 404-6 ; Hildebrand en, 



i. 285 ; of potatoes, i. 286, 359 ; of 



sugar-canes, i. 390 

 Grafting, Darwin on, i. 295 ; difficulty 



of, i. 294 ; in hyacinth bulbs, i. 276 

 Graham's Creed of Science, i. 393, 



394; " I7i 

 Graminese, Darwin on crossing, ii. 254 



Granite, explanation of association with 

 basalt, ii. 125, 145 



Grasses, range of genera, i. 403 ; 

 cleistogamous, ii. 362 ; fertilisation 

 of, ii. 291 ; F. MiAller on Brazilian, 



" 355 

 Gratiolet, on behaviour of eyes in rage, 



ii. 104 



Gravity, comparison between variation 

 and laws of, i. 194 



Gray, Prof. Asa, biographical note, i. 

 455> 456 ; articles by, i. 161, 166, 

 169, 170 ; as advocate of Darwin's 

 views, i. 157, 159 ; Darwin's opinion 

 of, i. 169, 170; on Hooker's Ant- 

 arctic paper, i. 466, 468 ; on large 

 genera varying, i. 99 ; letters to Dar- 

 win from, i. 214, 245, 421-2, 428- 

 33, 442-4 ; ii. 160 ; letters to, i. 



126, 127, 152-3, 202-3, 242, 419, 

 422-5, 430, 431, 433-5, 455-7, 

 459-60; ii. 252-5, 294-7, 299, 327, 

 328, 384; on Darwin's views, i. 126, 



127, 160 ; plants of the Northern 

 States, i. 432 ; on variation, i. 190-2; 

 book for children by, ii. 390 ; on 

 crossing, ii. 254 ; visits Down, ii. 

 354 ; on dimorphism, ii. 280 ; on 

 Agassiz, ii. 1 60 ; extract from letter 

 to G. F. Wright from, ii. 415; on 

 fertilisation of CypHpedium, ii. 270 ; 

 on Gymnadenia tridentai'a, ii. 311, 

 319 ; on Habcnaria^ ii. 277 ; on 

 Passiflora, ii. 316 ; on relative ranges 

 of U. States and European species, 

 ii. 252 ; on Sarracenia, ii. 401 ; men- 

 tioned, ii. 282, 289, 309, 434 



Gray, Mrs., ii. 385 



Gray, J. E., biographical note, i. 84 ; 

 and British Museum, i. 84 



Greatest Happiness principle, i. 327, 

 328 



Grebes, as seed-eaters, i. 116 



Greenland, absence of Arctic Legumi- 

 nosse, i. 469 ; connection with Nor- 

 way, i. 471 ; flora of, i. 155, 465, 

 466, 469, 470 ; introduction of plants 

 by currents, i. 468 ; as line of com- 

 munication of alpine plants, i. 443 ; 

 migration of European birds to, i. 

 487 



Greg, W. R. , Darwin on his Enigmas 

 of Life , ii. 41, 42, 44 ; letter to, ii. 

 41-42 _ 



Grey, Sir G., on Australian Savages, 



" 33 

 Grinnell expedition, reference to the 



second, i. 359 



Grisebach, A., i. 99, 100, 260 

 Grisebach, A. W., i. 249 

 Grossulariacese, i. 83 

 Grouse, Natural Selection and colours 



of, i, 143 ; Owen describes as 



distinct creation, i. 178 

 Grypoikerium Dcmvini, i. 1 1 ; G. 



domesticum, ii. 361 

 Guiana, Bates on, i. 181 

 Gulf- weed, Darwin on, i. 54, 56 

 Gully, Dr., i. 66 



Giinther, Dr., visit to Down, ii. 359 

 Gurney, E., articles in Forinightlv 



and Cornhill, ii. 440, 441 ; Power oj 



Sound, ii. 51 

 Gymnadenia, course of vessels in flower 



of, ii. 275; Asa Gray on, ii. 311, 



312, 319; penetration by pollen of 



rosteilum, ii. 313 

 Gynodicecism in Plant ago, ii. 417 



HAAST, SIR JULIUS VON. note on, ii. 

 154 ; on glacial deposits, ii. 154 



Habenaria, Azorean species, ii. 24 (see 

 also Peristyhts viridis) ; course of 

 vessels in flower, ii. 288 ; Lord Farrer 

 on, ii. 373 ; morphology of flower, 

 ii. 276-8 ; H. bifolia, flowers, ii. 283 ; 

 a subspecies of H. chlorantha, ii. 283; 

 H. chlorantha, considered by Bent- 

 ham a var. of H. bifolia, ii. 283 ; 

 structure of ovary, ii. 277 



Ila'ckel, E., convert to Darwin's views, 

 i. 259 ; Generelle Morphologie, i. 274 ; 

 Die Kalkschwiimme, i. 335 ; Freedom 

 in Science and Teaching, i. 383 ; 

 letters to, i. 277-8, 335-6 ; ii. 

 406 ; on pangenesis, i. 364 ; pro- 

 posed translation of his book, i. 277, 

 2/8 ; on reviews of Origin in Ger- 

 many, i. 304 ; on sponges, i. 335 ; 

 substitutes a molecular hypothesis for 

 pangenesis, i. 364 ; visits Down, i. 

 278 ; ii. 350 ; on absence of colour- 

 protection in lower animals, ii. 62 ; 

 on change of species, ii. 346 ; on 

 Linope, ii. 348 ; on medusae, ii. 350 



Hcematoxylon, bloom- experiments on, 

 ii. 411 ; sleep-movements, ii. 367 



Halictus, Fabre's paper on, i. 386 



Halifneda, Darwin's description of, i. 



17 



HaHeria, woody nature of, i. 163 



