480 



INDEX 



La Plata, H.M.S. Beaglfs visit to, 

 i. 13 ; Cervus of, i. 144 ; Mylodon 

 of, i. 243 ; plants of, i. 182, 452 : 

 extinct animals from, ii. 233 ; slates 

 and schists of, ii. 208 



Labellum, nature of, ii. 275 



Labiatae, large genera of, i. 107, 108. 



Laboratory, Darwin on the instru- 

 ments for botanical, ii. 417 ; found- 

 ing of Jodrell, ii. 416, 417 



Laburnum, i. 93 ; peloric flowers of, 

 i. 148 ; Darwin on hybrid, ii. 248 

 (see also Cytisus) 



Ladizabala, crossing experiments on, 



»• 354 



Lager str a mi a, F. Midler on, ii. 367, 



370 

 Lakes, Darwin on Ramsay's theory of, 

 ii. 154, 155 ; as agents in forming 

 Parallel Roads of Glen Roy, ii. 172-4; 

 of Friesland, ii. 191 ; Geological 

 action of, ii. 188, 189 ; Ramsay 

 on, ii. 154 

 Lamarck, Darwin on views of, i. 41, 43 ; 

 difference between views of Darwin 

 and, i. 153 ; Hist. Zoolog.^pi, i, 125 ; 

 Hopkins on Darwin and, i. 153 ; 

 Packard's book on, i. 342 ; quotation 

 from, i. 216 

 Lamellicorns, F. Midler on sexes in, 



ii. 63 ; stridulating organs of, ii. 83 

 Lamont, J., letters to, i. 143, 144, 179 ; 



note on, i. 143 

 Lampyridse, luminous organs of i. 307 

 Land, fauna of sea compared with 

 that of, i, 233 ; changes in level of 

 sea the cause of those on, ii. 167 

 Land-birds, resting on the sea, i. 285 

 Land-shells, dispersal of, i. 441 ; ii. 5, 

 13, 28, 29 ; of glacial period, i. 92; 

 modification of, i. 201 

 Land-surfaces, preservation for long 



periods, ii 156 

 Landois, reference to paper by. ii. 83 

 Language, observations bearing on 

 origin of, ii. 45, 55 ; Sir J. Ilerschcl 

 on study of, ii. 229 

 Lankester, E. Ray, letter to, i. 336 ; 

 ii. 215 ; drawing of earthworm used 

 in Darwin's book, ii. 215 

 Lankester, E. (Senior), speech at Man- 

 chester Brit. Assoc, meeting (1861), 

 on Darwin's theory, i. 195 

 Lantana, in Ceylon, i. 145 

 Lanugo, on human foetus, ii. 39 

 Lapland, richness of flora, i. 466 

 Latania Lodigesii, peculiar to Round 



Island, ii. 10 

 Latent characters, tendency to appear 

 temporarily in youth, i. 473 



Lathyrus aphaca, ii. 374 ; L. grandi- 

 florus, fertilisation of ii. 255 ; L. 

 nissolia, evolution of, ii. 374 ; ex- 

 planation of grass-like leaves, ii. 374 ; 

 Darwin on, ii. 397, 398 ; L. mariti- 

 mus, bloom on, ii. 41 1 ; L. odoratus, 

 fertilization of, ii. 389, 391, 392 ; 

 intercrossing of varieties, ii. 391 

 Lauder-Dick, Sir Thomas, on Parallel 



Roads of Glen Roy, ii. 172 

 Laurel, extra-floral nectaries of, ii. 399 

 Lava, Darwin and Scrope on separation 

 of constituent minerals of, ii. 125 ; 

 Elie de Beaumont's measurements 

 of inclination of, ii. 116; fluidity of, 

 ii. 134 ; junction between dykes and, 

 ii. 128-31 ; and metamorphic schists, 

 ii. 202 ; Scrope on basaltic and 

 trachytic, ii. 125 ; subsidence due to 

 outpouring of, ii. 144 

 Law, of balancement, i. 57 ; of growth, 

 i. 145, 343 ; of higgledy-piggledy, 

 i. 331 ; of perfectibility by Nageli, 

 i. 311 ; of sterility, i. 288 ; of suc- 

 cession, i 133 ; of variation, i. 193 

 Lawes, Sir J. B. and Sir J. H. Gilbert, 



Rothamsted experiments, ii. 216 

 Laxton, T., close on the trail of 



Mendelian principle, ii. 340 

 Lay Sermons, Huxley's, i. 280 

 Leaves, movements of, ii. 430 ; used 

 by worms in plugging burrows, 

 ii. 213 

 Lebanon, glacial action on, i. 460, 478 ; 

 plants of, i. 465 ; Hooker on Cedars 

 of, ii. 8 

 Lecky, Rt. Hon. W. E. H., Darwin's 

 interest in book by, i. 263 ; quoted 

 in Descent of Man, i. 328 

 Lecoq, Geographic Botanique, ii. 375 ; 

 on self-sterility, ii. 315 ; mentioned, 

 ii. 282 

 Lectures, Darwin on Edinburgh Uni- 

 versity, i. 7, 8 (see also Hooker 

 and Huxley) ; Max Midler's, on 

 Science of Language, ii. 45 

 Ledebour, allusion to book by, i., 99, 



100, 106 

 Leeds, address by Owen at (1858), 



i. 178 

 Leersia oryzoides, cleistogamic flowers 



of, i. 262 ; ii. 362 

 Leggett, W. H., on Rhexia virginica, 



ii. 292 

 Legitimate unions, heteromorphic or, 



ii. 310 

 Leguminosce, absence in Greenland, 

 i. 469, 470 ; absent in New Zealand, 

 i. 418 ; anomalous genera in, i. 87 ; 

 crossing in, i. 52 ; ii. 253, 254 ; 



