SUBJECT INDEX 



779 



186 ; effect on position of eyes, 186 ; rela- 

 tion to heteromorphosis in Antennula- 

 ria, 191 ff. 



GREEN SLIPPER ANIMALCULE: heliot- 

 ropism of, 15. 



GROWTH: phenomena of importance in, 

 175 ; dependence of, on geotrqpism, 191 ; 

 relation between concentration of sea- 

 water and, 228 ff. ; relation of, to quan- 

 tity of water, 247; and regeneration, 

 252. 



BLEMATOCOCCUS : heliotropism in, 114, 

 283. 



HEART: action of potassium salts on, 

 296. 



HELIOTROPISM: identity of, in animals 

 and plants, 1 ft'., 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, 52 ; 

 in caterpillars, 20, 42, 74; in fly larvae, 

 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 

 euphorbiae, 38; in Geometra piniaria, 

 40; periodic variations in, 40; in Papi- 

 lio 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 Melqlontha 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, 

 126; 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, 

 282; 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. 



HETEROMORPHOSIS : in Aglaophenia 

 pluma, 115, 130; definition, 120; in Tu- 

 bularia mesembryanthemum. 120 ff . ; 

 in Plumularia pinnata, 137 ; in Euden- 

 drium, 138, 140, 172 ; effects of aeration 

 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 Hirudinee. 341 ; 

 in Hirudo, 343; in Crustaceans, 627; in 

 Hydroids, 627 ff . ; in Antennularia, 628 

 ff. ; in Campanularia, 629. 



HYBRIDIZATION : possibility of, between 

 Chsetopterus and Echinoderms, 678. 



HYDRA : heliotropism of, 8, 73 ; theory of 

 polarity in, 117, 118, 216 ; regeneration 

 in, 149, 150, 173, 205; amount of sub- 

 stance necessary for regeneration of, 

 336. 



HYDROIDS: heliotropism in, 103-5; stere- 

 otropism in, 111; heteromorphosis in, 

 115, 116, 627 ff. ; geotropism in, 177. 



HYDROMEDUS^E : influence of ions on con- 

 traction of, 541 ; Eomanes's ideas of, 541. 



HYDROSTATIC PRESSURE : importance of, 

 for growth of tentacles of Cerianthus, 

 175 ; relation to geotropism, 181 ff . 



HYDROTROPISM : 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 . ; r6le 

 in life-phenomena, 544 ff . ; relation to 

 ciliary movements, 555 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- 

 bacia, 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. 



IRRITABILITY : 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. 



ISOPODS: change of sense of heliotro- 

 pism of, 419. 



