INDEX 



259 



Disease-resistance, breeding for, 71 

 Dispersal, means of, 142 

 Distribution, continuous, 168 



types of, 154 



significance of geographical, 139 

 Division, heterotypic, 37 



homotypic,.37 

 Dodder, 80 



Dominance, law of, 59 

 Dominants, 63 

 Drosera filiformis, 197, 198 

 Drynaria meyeniana, 4 

 Dumortiera, 174 



Earthworms, 194 



Egg, 21, 24 



Elementary species, in 



Elephants, 94 



Elodea, 196 



Enation, 132, 135, 231 



Endemism, 164 



Environment, adjustment to, 41 



fitness for, 93 



fitness of the) 83 



inheritance and, 66 

 Epiblast, 223, 224 

 Epidermis, 4 



Equinoxes, precession of the, 192 

 Equisetum, 234 



lelamatcia, 126 

 Eriocaulon septangular e, 157 

 Eugenia malaccensis, 163 

 Eugenics, 76 

 Eupatorium, 156 

 Evening-primrose, 114 

 Evolution and classification, 122 

 Evolution, early antagonism to. 91 



experimental, 118 



inorganic, 82 



meaning of, 79 



method of, 84 



organic, 83 



Existence, struggle for, 42 

 Experimental evolution, 101 

 Expression, inheritance versus, 40, 



48 

 Extinction, factors of, 195 



Factor, 64 



Factors, 65 



Falkland islands, 148 



Fern, life-cycle of a, 35 



Fern, life history of a, i, 20, 34 



Fertilization, 23, 24, 53 



Fertilization-membrane, 24 



Fimbristylis spathacea Roth, 146 



Fittest, survival of the, 43, 97 



Fleabane, 164 



Foliage-leaf, 10 



Foot, 25 



Forbes, Edward, 161 



Fossil, what is a, 183 



Fossil-formation, conditions of, 1 85 



Fossil record, significance of the, 235 



Fronds, 4 



Gaertner, 120 



Gametes, 32 



Gametophyte, 33 



Gaps in the fossil record, 193 



Genealogical tree, 237, 239 



Gene, 64, 65 



Generations, alternation of, 34 



two kinds of, 33 

 Genoa, 144 



Geothallus tuberosus, 1 74 

 Germination, 17 

 Germ-plasm, 75 

 Ginkgo, 139, 232, 233, 246 



biloba, 1 68 

 Ginkgoales, 246 

 Glaciation, effects of continental, 



160 

 Gleichenia circinata, u 



