Supyect INDEX 
779 
186; effect on position of eyes, 186; rela- 
tion to heteromorphvsis in Antennula- 
ria, 191 ff. 
GREEN SLIPPER ANIMALCUL: heliot- 
ropism of, 15. 
Growta: phenomena of importance in, 
175; dependence of, on geotropism, 191; 
relation between concentration of sea- 
water and, 228 ff.; relation of, to quan- 
tity of water, 247; and regeneration, 
pas a 
aa heliotropism in, 114, 
Hesars action of potassium salts on, 
HELIoTROPISM: identity of, in animals 
and plants, 1 ff., 89; influence of direc- 
tion of rays on, 2, 4, 5, 16, 53, 91, 108, 265 ; 
in plants, 4; in Hydra, 8; in Euglena, 
14; in Infusoria, 14; in bacteria, 15; 
in Bursaria, 15; methods of experi- 
mentation, 17; negative form of, 17, 56; 
positive form of, 17, 24; effect of col- 
ored rays on, 18, 29 ff.; in ants, 19, 523 
in caterpillars, 20, 42, 74; in fly larve, 
20; inversion of sense of, 20, 68, 265 ff., 
417 ff.; in Amphipyra, 21; in Forficula 
auricularia, 22; effect of temperature 
on 37; in butterflies, 37; in Bombyx 
lanestris, 38; in Moths, 38; in Sphinx 
euphorbie, 38; in Geometra piniaria, 
40; periodic variations in, 40; in Papi- 
jio machaon, 42; in plant lice, 45; in 
beetles, 56, 70, 85; in Mesocarpus, 56, 
113; character of protoplasm in, 57; 
in Musca, 57; in Tenebrio molitor, 70; 
in June bugs, 71; in Melolontha vul- 
garis, 71; in Cuma rathkii, 73 ff.; in 
earthworms, 73, 77; in Gammarus lo- 
custa, 73; in leeches, 73; in, planaria, 
73; in snails, 73; distribution of, in 
animal kingdom, 73; variations of, ac- 
cording to pole of animal, 79, 83; not 
dependent on central nervous system, 
84, 221; in sessile animals, 89; in Spiro- 
graphis Spallanzanii, 90-110; Sach’s 
theory of, 102; in hydroids, 103; in Ser- 
tularia, 103, 266; relation of, to instinct, 
109; sexuality in relation to, 113; in 
Balanus perforatus, 113, 272, 417; lack 
of, in Tubularia mesembryanthemum, 
426; in Eudendria, 141; effect of, on 
heteromorphosis, 174; in Asterina ten- 
uispina, 183; in Ciona, 221; in Limulus 
polyphemus, 267; theory of, 270; in 
Polygordius, 273; intensty of, 273; effect 
of concentration of sea-water on, 279, 
982; in Temora longicornis, 282; in 
Copepods, 283; difference in locomo- 
tion under influence of, 284; liberation 
of energy in, 286; in Loligo, 291; lack 
of oxygen in, 417. 
HEREDITY: theory of, 319. 
HerrromorpHosis: in  Aglaophenia 
pluma, 115, 130; definition, 120; in Tu- 
bularia mesembryanthemum. 120 f.; 
in Plumularia pinnata, 137; in Euden- 
drium, 138, 140, 172; effects of aration 
on, 140, 144; in Sertularia, 142; in Go- 
nothyrea lovenii, 144, 173; in Cerian- 
thus membranaceus, 150; in Actinia 
cara, 166; in Actinia equina, 166; in 
Adamsia rondeletti. 166; in Anemonia 
sulcata, 166; in Cereactis aurantiaca, 
166; in Actinia diaphena, 171; law gov- 
erning, 173; influence of geotropism on, 
191 ff,; in uninjured organs, 196; casu- 
istic ideas of, 249; in Antennularia an- 
tennina, 249; in Cladocora, 250: in 
horse-shoe crab, 267; in Hirudine. 341; 
in Hirudo, 343; in Crustaceans, 627; in 
Hydroids, 627 ff.; in Antennularia, 628 
ff.; in Campanularia, 629. 
HYBRIDIZATION: possibility of, between 
Cheetopterus and Echinoderms, 678. 
Hypra: heliotropism of, 8, 73; theory of 
polarity in, 117, 118, 216; regeneration 
in, 149, 150, 178, 205; amount of sub- 
stance necessary for regeneration of, 
Hyprorps: heliotropism in, 103-5; stere- 
otropism in, 111; heteromorphosis in, 
115, 116, 627 ff.; geotropism in, 177. 
HypromeEpus#: influence of ions on con- 
traction of, 541; Romanes’s ideas of, 541. 
HYDROSTATIC PRESSURE: importance of, 
for growth of tentacles of Cerianthus, 
175; relation to geotropism, 181 ff. 
Hyprorropism: in Plasmodia, 179, 182. 
HYPERSENSITIVENESS OF SKIN: produc- 
tion and suppression of, by electro- 
lytes, 748 ff. 
InFusorIA: heliotropism in, 14, 73; re- 
generation in, 205: importance of nu- 
cleus in, 321; influence of lack of oxy- 
gen, 636, 
Instinct: inherited, 61; _ movements 
called instinctive due to physical laws, 
107; physical laws in, 107-110; anthro- 
pomorphic idea of, 165. 
IoN-PROTEIDS: importance in absorp- 
tion of water by muscles, 510 ff,; role 
in life-phenomena, 544 tf.; relation to 
ciliary movements, 535 ff.; in parthe- 
nogenesis, 646 ff. 
Ions: physiological effects of, 450 ff., 501 
ff.; in relation to absorption of water 
by muscles, 464 ff.; velocity of migra- 
tion of. in relation to toxicity of, 474 
ff.; and rhythmical contractions of 
muscles, 518, 559; effects of, on devel- 
opment of muscle, 565 ff.; effect of, on 
undifferentiated embryonic tissue, 565 
ff.; in artificial parthenogenesis 576 
ff.; effect of, on fertilized eggs of Ar- 
pacia, 581 ff.; effects of, in artificial 
parthenogenesis of giant and dwarf 
embryos of Arbacia and Cheetopterus, 
674 ff.; effect of, on nerves, 703 ff. ; toxic 
and antitoxic effects of. 708 ff. 
TRRITABILITY: a. function of tempera- 
ture, 36; sex-differences in, 56; relation 
between structure of body and, 76; 
distribution of, 80; and form, 152; and 
organization, 213; dependence of, on 
concentration of medium, 262. 
Isopops: change of sense of heliotro- 
pism of, 419. 
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