412 



INDEX 



Glaucomys, distribution of races, 82 

 Gloger's Law, 45 



, application to tits and tree- 

 creepers, 46 



, Banks's evidence in support of, 48 



Glyptosternum, adaptation to water-flow, 



266 

 Gnophos, protective coloration, 281 

 Goldfish, see Carassius 

 Goldschmidt, Argynnis paphia var. 



valesina, 94 

 — , effects of high temperature on 



mutation-rate, 29, 223 

 — , hereditary stability of races of 



moths, 70 

 — , polymorphism, 282 

 — , sexuality in moths, 23 

 Goodrich, origin of domesticated races, 



189 

 Gracilaria, experiments on, 36 

 ' Gradient,' see Trends 

 Graft-specificity, 74 

 Graham Kerr, correlation, 161 

 Grasping organs, use in copulation, 



293 

 Grasshoppers, protective coloration, 



281 

 Gray, change in habits of Larus, 54 

 Gregarious larvae, in brightly coloured 



Lepidoptera, 246 

 Grey Squirrel, see Sciurus carolineruis 

 Grimpoteuthis, lack of modification in 



deep-sea forms, 270 

 Grinnell, geographical races in bats, 



107-8 

 Grinnell and Swarth, ' adaptable ' 

 species, 350 



, racial intergradation, 90 



Grosvenor, mating between races of 



Zygaena, 150 

 Group-formation, importance of, 12 

 — , in part independent of Natural 



Selection, 373 

 — , relation to adaptation, 369 

 Groups, 8 



— , difficulty in definition of, 9 

 — , topographical, 1 1 

 Grouse-locusts, linkage, 172 

 — , mutation-rates, 220 

 — , stability of colour, 1 9 

 Growth-rates, gradients in, 337 

 Gryllus, adaptive differences in ovipo- 

 sitor, 284-85 

 Gulick, local races, 64 

 — , racial divergence in land snails, 323 

 Gurney, lacustrine Limnocalanus, 45 

 — , local dimorphism in size of Cope- 



poda, 123 

 Guyenot, convergence in Edentata and 



Cetacea, 356 

 • — , spread of mutants, 13 



Guyer and Smith, experiments on 



Cavia, 36 

 Gypsy Moth, spread of, 322 

 Gyrinus, geographical races, 1 1 3 



Haagke, use of term ' orthogenesis,' 323 

 Habitat, differences between species, 



l 45> 3°4- 6 

 Habitats, untenanted, 322 

 Habit-formation, 50 

 Habits, origin of, 300-6 

 — , specific differences, 278, 300-6 

 Hachfeld, variation in nesting habits 



of Trachusa, 120 

 Hackett and Missiroli, zootrophic races 



of Anopheles, 120 

 Hadwen, White Reindeer attacked by 



parasites, 242 

 Hagedoorn and Hagedoorn, species- 

 populations, 171 

 — , inbreeding produced by isola- 

 tion, 170 



, nature of genes, 29 



, need of isolation in establish- 

 ment of mutants, 224 

 Haldane, J. B. S., criticism of Elton's 

 theory of survival of mutants, 320 

 — , effects of natural radiation, 30 

 — , evolution of complex organs, 307-8 

 — , evolution of dominance, 227 

 — , explanation of excessive size, 325, 



334 



— , frequency of mutations, 6 



— , mathematical treatment of Natural 



Selection, 318 

 — , melanism induced by lead and 



manganese, 30 

 — , modes of genetic representation, 23 

 — , multiple effects of single genes, 



170 

 — , Natural Selection under standard 



conditions, 366 

 — , orthogenesis, 327-28, 331 

 — ■, tachygenesis and caenogenesis, 328, 



334 

 Haldane, J. S., mechanistic explana- 

 tions in biology, 362 

 Hamm and Richards, predacious habits 



of Crabronidae, 51 

 Hammer and Henriksen, insular Myria- 



poda, 135 

 Hammerling, Dauermodifikationen, 35 

 Hansen, lack of geographical races in 



Euphausiacea, no 

 Hanson and Heys, lethal mutations 



induced by radium, 30 

 Hanson and others, effects of X-rays 



on Drosophila, 29 

 Hardy, mathematical treatment of 



Natural Selection, 218 



