August Weismann

tenberg@html@files@48132@48132-h@48132-h-6.htm.html#Page_49" class="pginternal">49;

number of eggs of agamic, 50;

deposition of eggs of, 93;

number of males of, 293.

Cynips, amount of nuclear matter in egg of, 229;

parthenogenesis of, 274, 290, 293.

Cypris, 294.

Cyto-idioplasm, 181, 184.

Cytoplasm, 184.

Daphnidae, segmentation of the egg of, 73, 199;

loss of jaws in development of, 89;

winter eggs of, 121;

sperm cells of, 175, 176;

parthenogenesis of, 228, 325;

summer eggs of, 236, 239, 240;

polar bodies in parthenogenetic eggs of, 249, 345, 350.

Darwin, on constancy of number of individuals in successive generations, 12;

on Pangenesis, 77, 370;

on atrophy of organs, 85, 90;

on cross fertilization, 309;

on effect of external influences, 391, 423.

Daucus, structure of root altered by cultivation, 414.

Death, origin of, 20, 21, 143;

relation to reproduction, 21, 120, 132, 154;

necessity of, 23, 24, 134, 159;

utility of, 24, 112, 135, 153;

an adaptation produced by natural selection, 24, 28, 60;

not universal, 25, 27, 111, 119;

by sudden shock, 63;

meaning of, 113;

definition of, 114;

of the soma, 154.

Degeneration of organs, see Atrophy.

Detmer, on transmission of acquired characters in plants, 395.

Melolontha vulgaris, see Cockchafer.

Mesozoa, 128.

Metazoa, 27, 28, 111, 145;

old age of, 157.

Metschnikoff, on pole-cells, 197.

Micellae, 190, 194.

Mimetic forms, 264, 280.

Mimosa, ‘after effects’ in, 404.

Minot, on cyclical development, 199;

on polar bodies, 214, 225, 340, 345, 353.

Moina, winter eggs of, 118, 240;

segmentation of, 199;

polar bodies of, 218.

Molluscs, length of life of, 55;

determined by markings on shell, 14;

enemies of, 58.

Monoplastides, 115, 122, 125, 146, 159;

definition of, 120;

reproduction of, 149.

Mouse, length of life of, 6; gestation of, 7.

MÜller, F., on heredity of acquired characters, 320, 322.

MÜller, H., on colours of flowers, 259;

on nectaries, 307.

Multicellular organisms, division of labour in, 27.

Musca domestica, length of life of, 43.

Musca vomitoria, polar bodies of, 353.

Myopia, 89.

NÄgeli, 167, 171, 175;

on idioplasm, 174, 182, 190, 201, 340, 414;

on inherent tendency to vary, 256, 298;

on Alpine plants, 269;

on adaptation, 300;

on medium of heredity, 318, 355.

Najadae, length of life of, 56.

Natica heros, length of life of, 56.

Nautilus, persistence of, 18;

death of female, 63, 132;

parthenogenesis of, 293.

Pulex irritans, length of life of, 42.

Pupa, length of life of, 55.

Footnotes were collected at the end of each essay and of the appendices for each essay.

On page 198 the formula (1/p) should probably be (1/pn).

Obvious typographical errors have been corrected. Any inconsistencies in spelling have been left.

“Notes” as used in this volume often means the same as footnotes. The Appendix to Essay I contains the "Notes" as used in that essay. In the footnotes to the Appendix to Essay I, one note refers to a note on another page which has been collected with all the other notes. The note referred to is indicated by a local note in braces.