INDEX OF SUBJECTS
Reading edition
PAGE
Abraxa grossulariata, 105, 193
Aceras hircina, local variability, 123
Achatinellidae, local forms of, 133
Acquired characters, inheritance of, 188 et seq., 217, 233
Acronycta psi, melanic, 138
Adaptation, problem of, 187, 234
Agelaius, local forms, 120
Agrotis, fixed and variable species, 25
Alkaptonuria, 83
Alpine Plants, growing larger, if protected, 183
Alpine Varieties, 165
Alytes obstetricans, Kammerer's experiments on, 199, 210
Amblystoma, races of, 230
Amphidasys betularia, melanic form, 136, 138
dimorphic larvae, 141
Anodonta, polymorphism of, 130
Antirrhinum, striped, 57
species-hybrids, 99
albinos, 110
Apple, will not cross with pear, 239
Arctia caja, effects of temperature, 192
larval variation in, 231
Arctic varieties, 165
Argynnis paphia and valesina in Italy, 121
Armadillo, polyembryony, 42
Artistic faculty, 89
Arum, rights and lefts, 57
Auriculas, short-styled selected, 236
Axis of symmetry in hand and foot, 48
Axolotl, alleged effect of conditions, 230
Azalea, bud-sports, 55
Bacillus anthracis, unsegmented form, 71
Bacillus prodigiosus, variation in, 213
Bacteria, variation in, 212
Bacterium coli, variation in, 214
Baeolophus, geographical races of, 159
Barley, right and left-handed, 58
Basilarchia, geographical races of, 161
Begonia phyllomaniaca, 50
hybrids, 51
Bizarre Carnation, genetics of, 54
Black, as a variation from red, 148
Blackbird, varying, 150
Black Cock, fixity of, 28
Boarmia repandata, melanic form, 136
rhomboidaria, 137, 139
Botrytis susceptibility to, 108
Bovidae, hybrid, 242
Brachydactyly, 89, 95
Bradypus, vertebral variation, 68
Bud-sports geometrically irregular, 54-57
Buffalo, attempts to hybridize, 242
Bullfinch, gynandromorph, 45
Bulimus detritus, local variation of, 126
Canary, asymmetrical markings in, 154
Canidae, hybrid, 241
Capsella, 100
Cardamine pratensis, 239
Cat, Polydactylism, 53
Carnation, Picotees and bizarres compared, 54, 58
Cataract, hereditary, 89
Certhiola, melanic, 142
Chladni figures, 60
Choloepus, vertebral variation in, 68
local variation in, 119
Cinerarias, self-sterility in, 238
Cistudo, local variation in, 119
Climatic varieties, 164
Coccaceae, variation in, 213
Coenonympha arcania, climatic forms of, 179
satyrion, 180
Coereba, melanic, 142
Colaptes, geographical races, 147 et seq.
chrysoides, 154
Colloids, growth in, 65
Colorado beetles, experiments on, 218
Colour blindness in twins, 44
Continuous variation, possible example of, 173
Coracias, geographical races of, 160
Cotton, genetics of, 98, 100
Coupling, 110
Crab, extra claws, 74
Crustacean appendages and Serial Homology, 63
Crystals, analogy with, 78
Cyclopian monsters, artificial, 50
Daphnia, changed by environment, 217
Dasypus, polyembryony, 42
Dianthoecia, fixed and variable species, 25
Disease-resistance, 87
Division, power of,
a fundamental attribute of living things, 38
Genetics of, 46, 50
Dogger Bank, large varieties on, 125
Dogs, hybrid, 241
Dominance, nature of, 95
Dominants, origin of new, 88, 90, 95
Double monsters, 42
Draba, experiments with, 242
Drosophila, 91
Payne's experiments on, 228
Earthworm, regeneration, 77
Elephant, tusk segmented, 38
Entelechy, 80
Environmental treatment, effects of, 188 et seq.
Enzymes and genetic factors, 86
Epilepsy, inheritance of traumatic, 197
Equidae, sterility of hybrid, 241
Erophila, experiments with, 242
species, 249
Exacum, right and left, 57
Euphonia elegantissima, local forms, 120
Eupithecia rectangulata, melanic form, 137
Factors, new, 88
loss of, 96
Factorial representation of varieties, 158, 165
Falcons, geographical races, 147
Fasciation, 49
Ferments, Boyle on, 54
Finger-prints of twins, 44
Fixity and Variability in species, 25
Flax, climatic experiments, 197
Fowl, Silky, 84
Leghorn, 85, 90
Dominant white, 94
Wyandotte, 97
Rumpless, 46
Foxes, incompatibility with dogs, 241
Free-martin, 44
Fringillidae, sterility of hybrid, 241
Fundulus, cyclopian, 50
Gallus, invariability of wild species, 13
and origin of poultry, 90, 97
Genitalia, a basis for classification in insects, 13
Gentians, climatic experiments, 197
Geometrical structure and differentiation, 54, 56
Geometrical distinction between germ-cells and somatic cells, 58
Gladiolus, right and left, 57
Gnophus obscurata, protective colouring, 141
Goldfinch, geographical races, 147
Gonioctena variabilis, variation in sexes of, 121
Gouldian Finch, polymorphism, 148-149
Gracilaria stigmatella, experiments on, 193
Grantia, large varieties of, 125
Ground-Squirrels, local forms of, 132
Grouse, red, variation, 29
Guillemot, Ringed, 150
Guinea-pig, Brown-Séquard's experiments on, 198
Gynandromorphs, 45
Heliconius erato, forms of, 122, 164
Helix lapicida, local variation of, 126
striata, 127
Heripensis, 127
Caespitum, 127
trochoides, 127
nemoralis and hortensis, 128
Helminthophila, geographical races of, 157
Hemerophila abruptaria, melanic, 142
Hepialus humuli, in Shetland, 119
Heterostyle plants, 236
Hieracium, 9
Himantopus, 234
Homoeosis, 68
Hybernia progemmaria, 139
Hybrids, sterility of, 233 et seq.
Incompatibility between certain allied species, 239
Individual, geometrical independence of, 58
Inhibiting Factors, 95
Intermediates, nature of, 131, 135
Isolation, consequences of, 118
Lacerta muralis, Kammerer's experiments on, 209
fiumana, 210
Leptinotarsa, Power's experiments on, 218
Limbs, extra, in pairs, 72
Limnaea, sinistral, 134
Linaria vulgaris, self-sterility, 239
Loasa fruits, right and left, 57
Lobster, extra claws, 76
Locality, variation connected with, 14, 118, 146 et seq., 208
Lumbricus, regeneration, 77
Lychnis dioica and vespertina, inter-relations of, 18
macrocarpa, possibly a common parent of, 19
Machetes pugnax, polymorphism of male, 28
Maize, Blaringhem's experiments on, 229
Maize, cumulative factors in, 116
Malformations, dominants, arising de novo, 89
Manx Cat, heredity, 46
Matthiola, 84, 104, 113
Melanic varieties, 135 et seq.
Memory, analogy with heredity, 190
Meristic variation, 69, 83, 86
Mirabilis, striped, 57
Models of segmentation, 59, 60
"Modes," Coutagne's conception of, 126
Mödling, peculiar race of Pieris napi at, 178
Mole, albino, 27-28
Mule, Linnaeus on, 8
Mutation, Matthioli on, 4
in Mercurialis, 5
in Kales, 5
alleged in bulbs, 5
Theory, 97
periods of, 114
in Bacteria, 214
Mutilation, consequences of, 71
alleged effect of, on offspring, 229
Myxococcus, variation in, 213
Narwhal, asymmetry of tusks, 44
Nemesia strumosa, 91
Neuration, a basis for classification, 13
Nicotiana, sterility of hybrid, 242
Nightjars, varying, 150
Noctuidae, fixity and variability, 25
Noctua, polymorphic and fixed species, 25
Noctua castanea, local forms of, 122
Nomenclature, future of, 94, 245
Notonecta, variations of, 130
Odontoptera bidentata, melanic form, 137
Oedipodidae, protectively coloured, 140
Oenothera, new dominant in, 92
rubricalyx and rubrinervis, 92, 95
Lamarckiana, 92, 101
origin of, 102, 244
has bad pollen-grains, 102
factorial analysis of, 103
pollen and egg-cells genetically dissimilar, 104
Oenothera, "twin hybrids", 105
laeta and velutina, 105
reciprocal crosses in, 105 et seq.
possible coupling in, 111
dwarfs, 112, 114
"Triple hybrids", 114
alleged variation due to treatment, 227
Ophrys, local variability, 125
Orange, polyembryony, 45
Osmotic growth, 65
Overlapping forms, 146, 174
Papilio, geographical races of, 162
Papilio turnus, variation of, 144
Pararge egeria, geographical forms, 166 et seq.
Parthenogenesis, 50
Partula, local forms of, 133
Passer domesticus and montanus, distinctions, 22
Pea, round and wrinkled, 95
Pear, will not cross with apple, 239
Pelargonium, variegated, 55
bud-sports, 56
Periodic phenomena in structure, 63
Peronea, fixed and variable species, 26
"Petites espèces", 248
Petunia, double, 104
Phalanger maculatus, local variation, 119
Pheasant, fixity of, 29
Phigalia pilosaria, melanic, 139-140
Phratora vitellinae, experiments on, 193
Phyllotaxis, 69
Pied varieties common in Passer domesticus unknown in Montanus, 23
Pieris napi and bryoniae, 174
Pig, mule-footed, 46
Pigeon, web-footed, 46, 49
Indian Rock, a recessive form, 98
Pigments, nature of, 83
Pisum humile, hybrids with culinary peas, 244
species, 246
Planarian, regeneration of, 71, 77
Plotheia frontalis, polymorphic, 26, 29
Plusia, fixity and variation in, 26
Poephila gouldiae, variation of, 148-149
Polarity of individual, 44
Polia chi, melanic, 138
Polyanthus, short-styled selected, 236
Polydactylism in Cat, 52-53
Polyembryony, 45
Potato, variation in, 91
Poultry, evolution of, 90
Primula obconica, 91
Primula sinensis, flaked, 57
Leaf-shapes, 70
new dominant in, 92
sterility in, 236
"Giants", 236
Primula, species-hybrids, 242
Protective coloration, 140
Pyrrhulagra, local forms, 120
Python, twin-vertebrae, 60
Quiscalus, geographical races of, 156
Rabbit, Angora, 46
colours of, 93
Incompatibility with hare, 242
Raimannia odorata, Macdougal's experiments on, 226
Rats, Variation in, 248
Recessives, origin of, 90
Reciprocal crosses, giving distinct results, 105 et seq.
Regeneration, 70
Repulsion, 110
Reversal on Regeneration, 77
Rhamphocoelus, geographical forms, 159, 184
Rhinoptera, variation in jaws of, 38
Rhythm in repetition, 69
Ribs, variation of, 68
Rights and Lefts, 57-58
Ripples, analogous to segments, 60, 66-67
regeneration of, 79
Rollers, geographical races of, 160
Ruff, polymorphism of male, 28
Salamandra, maculosa and atra, 182, 199, 203
spotted and striped, 207
geographical variation of, 208
Segmentation, nature of, 63
simulated mechanically, 64
compared with rippling, 65
analogies with, 68
Segmentation of normally unsegmented structures, 38
Selection, Natural, an insufficient cause of definiteness of types, 17, 134, 142
Sempervivum, 250
Serial Homology, the true nature of, 62, 66
Setina, Alpine varieties, 181
Sex of Twins, 44
Sex-factors, possible coupling of, 111
Sexual characters, variation in, 119 et seq.
Siamese twins, 44
Silky Fowl, 84-85
Simocephalus, changed by environment, 218
Sinistral forms, 33-34
Situs transversus, 43
Skate's jaws, variation in, 38
Sloths, vertebral variation, 68
Species, conceptions of, 3, 94, 99, 240, 245
allied, distribution of, 185
alternative uses of the term, 245
Specific difference, universality of, 12
of organisms compared with those of inorganic materials, 15
failure of theory of Selection to explain, 18, 134, 247
Sphyropicus varius, 149, 156
Spilosoma lubricipeda, varieties of, 181
Zatima, Heligoland form, 181
Spinal nerves, segmentation of, 67
Sporadic variation, 131, 134, 248
Squashes, polymorphism of, 100
Staphylococcus pyogenes, variation in, 213
Sterility of hybrids, in general, 233
in Lychnis hybrids, 20 et seq.
in crossing forms of Draba, 243
Significance of, 244
Self, 238
Stilt, 234
Stocks, 84, 104, 113
Striped varieties, 57
Substantive variation, 84
Subtraction-stages, 93
Supernumerary limbs, 72-76
Sweet pea, variation of, 91
sterile anthers in, 237
Symmetry compared with heredity, 41
Symmetry of body approximate, 78
Syndactyly, 47
in foot, 48
Synthetic formulae, in nomenclature, 94
Taeniocampa, fixed and variable species, 25
Tamias, local forms of, 132
Tanagers, geographical races of, 159
Teeth, variation in, 39, 67
Tephrosia consortaria and consonaria, 137, 139, 140
Tephrosia species, separated by season, 119
Terminal members, variation of, 68
Thais rumina, local variation in, 27
Tolerance, persistence of diversity due to, 17, 134
Tomato, number of cells in fruit, 46
Transitional populations, rarity of, 165
an example, 178
Tropaeolum, sterile anthers in, 237
Trypanosomes, variation in, 215
Tusk, of Elephant, segmented, 38
of Narwhal, 44
Twinning, 41, 44, 71
heredity of, 45
in organs, 46
Uria troile, variety of, 150
Vanessa urticae, effects of temperature, 191
Variation, a medley of phenomena, 14-15
sporadic, 131, 134
and locality, 118
Causes of genetic, 86, 87, 131, 212
Substantive and meristic, 83
Veronica, specific difference in, 16
intermediates between species, 17
Vertebrae, division in, 60-61
homologies of, 66
Vespa, specific difference in, 23
Vortex, living organism compared with, 40
Wave-motion compared with repetition of parts, 62, 67, 79
Wheat, cumulative factors in, 116
climatic experiments on, 195
Woodpecker, 234
Zebra, pattern of stripes compared with ripples, 38