264 



INDEX 



Dromia -vnlgaris transferred to fresh 

 water, 188 



DUBALEN, on molluscs living in warm 

 waters, 205 



DUGES, on colour-variation, 51 



DUNCAN (D.), on toxic foods, 135 



DURET (CLAUDE), quaint evolutionary 

 notions, 14 



Dwarf plants, 71 ; elephants, 73 ; dogs, 

 73 ; rabbits, 74 



Dwarfing of Japanese plants, 71 ; and 

 sterility, 75 ; of Lymntea, and in- 

 fluence on sexuality, 200 



Echium, physiological differences ac- 

 cording to climate, 115 

 EDMONSTONE (DR.), on differences in 

 the structure of the stomach of 

 Larus according to food, 105 

 Eels, experiments en the influence of 



salt, 190 



Elephants, small in Malta, 73 

 Elodea, 81, 82 



Embryology : arguments for evolution, 

 29 ; ontogeny and phylogeny, 30 ; 

 arguments from the circulatory 

 apparatus, 32 ; from the nervous 

 system, 35 ; from teratology and mal- 

 formations, 36 



Environment, its modifying influence 

 on organisms, 179 ; a very slight 

 change may be fatal, 181 ; and de- 

 velopment, 197 ; and physiology, 

 201 ; and deformation, 207 ; and 

 leaf forms, 209; and plant life, 219; 

 factor in evolution, 229 ; proposed 

 experiments, 233 

 Eqnns Prjevalskii, 159 

 Erica vulgaris, 54 

 Eiigeron alpinns, 55 

 Eiionymiis, variegated, 58 ; E. siil- 

 furea, 59 ; E. ra.dica.ns variegata, 

 59 



Euphorbia, 140 

 Evolution theory stated, n, 12 

 historical sketch, 13 

 proofs : palseontological, 29 

 embryological, 29 

 pathological, 36 ; morphological, 



38 



mental, 41 ; proof wanted, 42 

 and experiment (Bacon on), 43 

 factors of, 229 



first, change of environment, 233 

 second, use and disuse, 235 

 third, selection, 236 

 Evolution, experimental, aims of, 251 

 need of, 45 



based on three groups of fucts, 46 

 first, variations in structure, 47 

 second, variations in colour, 48 



third, variations in dimensions, 70 

 first group of facts supporting it, 



46 

 second group of facts supporting 



it, 156 

 third group of facts supporting it, 



170 

 fourth group of facts supporting 



it, 179 



Experiment and observation, 180 

 Experiments proposed on environment, 



233 A j- 

 on use and disuse, 235 



on selection, 236 

 on crossing, 243 

 physiological, 250 



FABREJOU, on the influence of environ- 

 ment on plants, 96 



FAIVRK, on variability, 98 



FALLOU (J ), on experimental produc- 

 tion of abnormalities among butter- 

 flies, 195 



Fertility influenced by external condi- 

 tions, 221 



FILHOL (H.), on variability in palaxm- 

 tological faunas, 150 



FISCH, on proportion of both sexes in 

 plants, 107 



FISCHER, on molluscs living in warm 

 waters, 205 



FLAHAL'LT, See BONNIER ', On the 



colour of plants grown from the same 

 set of seeds under different condi- 

 tions, 56 



Flesh, chemical variations according 

 to condition of the animal, 117 



Flesh, differences in taste and chemis- 

 try according to the food of the 

 animal, 66 



Flower, variability, 100 



FOLIN (MARQUIS DE), on the irregu- 

 larity of some pond snails, 93 



Food and colour, 57 ; and length of 

 wool, 90 ; and structure of the 

 stomach, 105 ; and sexuality, 107, 

 109 ; and chemical composition, 118 



Foraminifera, 27 



FORCHAMMER, on chemical differences 

 between different species of the same 

 genus, 118 



Form-variation, 93 ; among molluscs, 

 93 



FOURNIER (G.), on variation among 

 Cruciferae, 98 



Fox, colour- variation. 53 



Fresh water, generally but not always 

 fatal to marine animals, 185 



Fruit, variations, 99 



Fiicns, chemical differences between 

 different species, 118 



