INDEX 



4i5 



Kemp, modifications resembling those 



of deep-sea fauna found in shallow 



waters, 269 

 Kikuchi, variation in Brachionus, 20 

 Kinsey, galls of Cynips as specific 



characters, 121 

 — , spread of mutants, 13 

 — , time of emergence of gall-wasps in 



different areas, 123 

 Kirkman and Jourdain, discontinuous 



geographical races in Carrion Crow, 



116 

 Kirkpatrick, death-rates in Oxycarenus 



in nature, 194 

 Kleinschmidt, Formenkreise, 70 

 Knight, variation in Perillus, 20 

 Kobelt, distribution of Helicigona, 288 

 Kofoid, variation in the Dinoflagellata, 



7 

 Kohl, classification of the Crabronidae, 



Kolbe, variation in sculpture in the 



Dytiscidae, 93 

 Kosminsky, variation in male genitalia 



of Abraxas, 156 

 Kiihn and Henke, variation in Ephes- 



tia, 20, 87 



Lacerta, variation in habits, 54 

 Lacerta simonii, area occupied, 1 1 7 

 Lack, habits of Reed Bunting, 54 

 Lackschewitz, seasonal occurrence of 



Tipula, 143 

 Lamellibranchs, structure of eyes, 307 

 Lampyridae, light-emission considered 



as an adaptation, 348 

 Lancefield, races of Drosophila obscura, 



157 

 Lang, adaptive value of lower valve of 



Hippurites, 333, 335 

 — , examples of excessive size and com- 

 plexity, 331, 332 

 — , momentum, 340 

 — , orthogenesis, 326 

 — , species of Culicella separable as 



larva: only, 122 

 Lapouge, characters of Pleistocene 



Carabus, 132 

 Larus ridibundus, variation in habits, 54 

 Larval characters, specific differences, 



121-22 

 1 Larval memory,' 41, 51 

 Lashley, experiments on pure lines, 



1 9 I 



Lasiocampa, establishment of voltinism, 



144 

 — , isolation of races, 143, 146 

 Lead acetate, defects induced by, 30 

 Leaf-miners, specific differences in 

 habits, 304 



Lebistes, effect of external factors on, 169 

 Leigh-Sharpe, specific differences in 



copulatory fins of Selachians, 297 

 Lemming, absence of winter moult, 241 

 von Lengerken, habitat of Cicindela, 



145 

 Lepidoptera, albinism, 92 



— , difficulty of defining races, 1 1 1 



— , gregarious larvae in species with 



warning colours, 246 

 — , hereditary stability of races, 70 

 — , leathery integument of species 



with warning colours, 245 

 — , modification of voltinism, 123, 357 

 — , parallel variation, 326 

 — , power of accommodation in pupae, 



281 

 — , role of scent-organs in isolating 



species, 150 

 — , secondary sexual characters, not 



significant in mating, 296 

 — , species-intergradation, 89 

 — , species-recognition, 148 

 Leptinotarsa, experiments on, 37 

 Le Souef, changes in Wallabies and 



Opossums, 48 

 Lestes, modifications of abdomen, 291 

 Lice, see Pediculns 

 Liesegang's rings, 272 

 Liguus, geographical races, 108 

 — , insular forms, 137 

 Limax, polymorphism, 101 

 — , variation in habits, 54 

 Lime, influence on Mollusca, 81 

 Limnea andersoniana, form determined 



by water-flow, 81 

 Limnea palustris, deep-water form, 81 

 Limnea peregra, non-heritable varieties, 



20 

 Limnocalanus, age of species, 132 

 — , relict species, 45 

 Lineage, 59, 65 

 — , validity of concept in plastic species, 



66 

 Linkage and correlation, 170, 172 

 Linnean system, 61 

 Linneon, 59, 73 

 Linsdale, protective resemblance in 



Passer el la, 238 

 Little and Bagg, effect of X-rays on 



mutation-rate, 29 

 Lloyd, local populations of rats, 70 

 Lobipluvia, eggs resembling red soil, 



237-38 

 Local races, 64, 69 

 ' Lock and key ' theory, 152 

 Longley, blending of bright colours 



with background, 243 

 Lonnberg, adaptive difference in 



Varanus, 290 

 — , age of species of Cottus, 1 32 



