Accidental Regeneration, 25.
Achimenes, 88.
Actinians, 142.
Actinosphærium eichhornii, 65.
“Action at a distance,” 283-287.
Adaptation, 94, 158, 277, 288-292.
Allman, 38.
Allolobophora terrestris, 172, 174, 175.
Alpheus platyrrhynchus, 63.
Amœba, 103.
Amphibia, 106.
Amphioxus, 105, 139, 231, 237.
Amphiuma, 106.
Analytische Theorie of Driesch, 253-254.
Andrews, E. A., 152.
Andrews, Mrs. G. F., 251.
Anguis fragilis, 198.
Annelids, 104, 143.
Antennularia antennina, 30-33, 103, 131.
Ants, 154.
Aristotle, 1.
Aschoff, 115.
Ascidian, 114, 149.
Ascidian egg, 236.
Asplenium, 23.
Asterias vulgaris, 102, 103.
Atrophy, 111, 123-125.
Atyoïda potimirum, 24, 213.
Aurelia, 104.
Autolytus, 143.
Autotomy, 110, 142, 150-155;
theories of, 155-158.

Baer, von, 208.
Balbiani, 66, 129.
Bardeen, 41, 136.
Barfurth, 21, 45, 54, 129, 137, 197, 199, 200.
Begonia, 23; B. discolor, 74.
Beneden, Van, 210.
Beroë ovata, 239.
Bert, 178.
Bickford, E., 57, 202.
Biophors, 278.
Bipalium, 13, 14, 104; grafting, 170.
Birds, 97, 106.
Bizozzero, 128.
Blastomeres, 19, 110.
Blastulæ, fusion of, 188.
Blood vessels, 120, 122-123.
Blumenbach, 112.
Bock, von, 149.
Bombinator igneus, 184.
Bones, 113, 124, 181.
Bonnet, 1;
experiments with worms, 2, 26, 38, 41, 92, 112, 200, 260, 261, 267.
Bordage, 97, 100, 157.
Born, 182-183, 243.
Boulenger, 214.
Boveri, 68, 228.
Braefeld, 17, 80.
Braem, 211.
Brandt, 65.
Breaking-joint, 150-152.
Brindley, 100, 104.
Brittle-stars, 105, 144, 145.
Broussonet, 97.
Bryozoa, 211.
Budding, 142, 149-150.
Bülow, 190, 213.
Bunting, 237.
Byrnes, 182.

Callus, 82, 83.
Camerano, 92.
Campanularia, 35.
Carniola, 106.
Carodina, 213.
Carrière, 104, 213.
Cat, 179.
Caterpillar, 100, 104, 154.
Cause, 287, 290.
Cells, origin of, 190-215.
Cephalodiscus, 149.
Cerianthus membranaceous, 41, 104.
Cermatia forceps, 100.
Cestodes, 103, 146.
Chabry, 236.
Chætogaster, 146.
Chætopterus, 189.
Chun, 238.
Ciona intestinalis, 42.
Closing wound, 69.
Cockroach, 100, 104.
Cœlenterates, 145, 149.
Cohnheim, 118, 119.
Colucci, 112, 203.
Conifers, 76 (footnote).
Conklin, 116.
Connective tissue, 180, 181.
Contact, 33, 37.
Coprinus stercorarius, 86, 87.
Corals, 142.
Crab, 43, 151, 152, 158.
Crampton, 236, 240, 245.
Crayfish, 100, 151, 157.
Crepidula fornicata, 116.
Crinoids, 105.
Crystal, regeneration of, 263-264.
Ctenodrilus monostylos, 144, 148.
Ctenodrilus pardalis, 144, 148.
Ctenophore-egg, 238-241.
Ctenophores, 142.
Cuvierian organs, 105.
Cytotropism, 69, 281.

Dalyell, 129, 144.
Darwinism, 108.
Darwin’s pangenesis, 278.
Delage, 25, 92.
Dendrocœlum, 104.
Difflugia, 103.
Double structures, 128, 135-141.
Driesch, definition of regeneration, 21, 22;
reparation, 22;
regulation, 22;
restitution, 22;
self-regulation, 22;
antennularia, 32;
43, 57, 59, 60, 135, 139, 188, 202, 228-236, 243, 246, 248, 250, 251, 252-255, 257, 267, 268, 274, 280, 281-287.
Driesch and Morgan, 239-241, 245.
Du Bois-Reymond, 286.
Dugès, 136.
Duhamel, 178.
Duyne, van, 136, 140, 141.
Dwarfs, 116.

Earthworm (Allolobophora fœtida), 9, 12, 38-39, 40, 53, 144, 170, 194, 271, 280, 290.
Echinoderms, 105, 144.
Echinus microtuberculatus, 68.
Egg, 18, 19, 139, 188, 216.
Embryo, 18, 110, 216;
grafting in, 182-189; union of, 188;
tension hypothesis, 274.
Endres, 221.
Epeiridæ, 100.
Epimorphosis, 23.
Epithelium, 180.
Eudendrium racemosum, 29, 30, 103.
External factors, 26.
Eye, 203;
crustacea, 30;
lens, 203-205.

Factors, 277.
Faraday, 136.
Fiedler, 228.
Fischel, 112, 205-207, 240, 291, 292.
Fischer, 124, 178.
Fish, 6, 97, 131-133, 274, 281;
lens, 290.
Fish’s eggs, 237.
Flatworms, see Planarians.
Food, influence of, 27, 37, 120, 122, 123.
Force, 76, 287.
Formative forces, 255, 277, 288.
Formative stuffs, 40, 88, 89, 90, 91.
Fraisse, 21, 97, 196, 197, 198, 199, 200, 214.
Fredericq, 151, 152.
Frogs, 106.
Frogs’ egg, 216.
Fundulus eggs, 237.
Fundulus heteroclitus, 45, 97, 274.

Gastroblasta Raffælei, 142, 145.
Gerassimoff, 66.
Germ-layers, 207-212.
Giants, 115.
Giard, 92.
Godelmann, 154.
Goebel, 22, 85, 86, 88, 89, 90.
Goette, 106, 200, 201, 213.
Gonionemus, 104, 125.
Grafting, 159-189.
Gravity, influence of, 30-33, 37.
Grawitz, 119.
Growth, 128, 131-135, 269-271, 278, 292.
Gruber, 66.
Guinea pig, 179.

Haberlandt, 66.
Haeckel, 102, 208, 216.
Half-embryos of frog, 216-226.
Hargitt, 125, 127, 168, 169.
Harmony, 282.
Harrison, 186, 187.
Heart, 124.
Heineken, 100.
Helicarion, 93.
Heliotropism, 271.
Hepke, 190, 192.
Herbst, 30, 214, 286.
Hermit-crab, 63, 97-99;
autotomy, 155.
Herrick, 153.
Hertwig, O., 22, 23, 222-227, 243, 246, 251, 252, 256, 278, 280, 288.
Hertwig, R., 228.
Hescheler, 44, 194, 196.
Heterocentron diversifolium, 74, 80.
Heteromorphosis, 24, 38-42.
Heteronereis, 143.
Heterotropy, 280.
His, 241.
Hjort, 210.
Hofer, 66.
Holomorphosis, 24.
Holothurians, 105, 145, 154.
Homology, 209.
Homomorphosis, 23.
Hunter, 178.
Huxley, 208.
Hyacinthus orientalis, 88.
Hydra, 1, 2, 11, 56, 103, 121, 122, 124, 142, 149;
grafting, 159-166, 203, 270, 272.
Hydra grisea, 169.
Hydra fusca, 169.
Hydractinia, 103, 168.
Hyperplasy, 115.
Hypertrophy, 111, 115-123.

Idiosomes, 278.
Ilyanassa obsoleta, 240.
Internal factors, 38, etc., 52-54.
Internal organs, 52-54, 111.
Iris, 204-207.
Ischikawa, 203.

Jelly-fish’s eggs, 237.
Joest, 170-175, 186.

Kennel, von, 147, 148, 149.
Kidney, 113, 116, 124, 180.
King, 102, 103, 125, 135, 139, 153, 162, 214.
Klebs, 66, 118, 120.
Knight, 75.
Knowlton, 27.
Kochs, W., 112.
Kowalevsky, 208, 210.
Kretz, 112.
Kroeber, 196.

Lamarckianism, 157.
Lang, 92, 93.
Lateral Regeneration, 9, 10, 28, 29, 43.
Leeches, 146.
Lefevre, 210, 211.
Lepelletur, 100.
Lepismium radicans, 78.
Lessona, 92, 93.
Liability to injury, 92-110;
view of Réaumur, 92;
of Bonnet, 92;
of Darwin, 92;
of Lang, 93;
of Semper, 93;
of Weismann, 93-96.
Light, influence of, 29, 30, 37.
Lillie, 26, 56.
Limnæa, 104.
Linckia multiformis, 102.
Lithium salts, 286.
Liver, 111, 180.
Liverworts, 16.
Lizard, 6, 94, 106;
double tail, 137-139;
198, 214, 290.
Lobster, 153.
Loeb, J., 24, 29, 30, 31, 33, 34, 35, 42, 59, 67, 68, 102, 114, 131, 139, 141, 189, 231, 267, 268.
Loeb, Leo, 179.
Ludwig, 105.
Lumbricus rubellus, 172, 174, 175.
Lumbriculus, 43, 104, 144, 149, 190, 191.
Lung, 112.
Lunularia vulgaris, 84, 85.
Lymphatic glands, 121; grafting upon, 179.

Machine theory, 281.
Mammals, 97, 117-118;
grafting, 178.
Man, 107;
grafting, 178, 179.
Mantis, 100, 104.
Margelis carolinensis, 34.
Marshall, 124-125.
Martens, von, 102.
Mauritius, fighting cocks, 97,