SuBsJEctT INDEx 
781 
PHASCOLOSOMA: artificial parthenogen- 
esis in, 682, 772. 
PHOTOKINETICS: definition, 265; reac- 
tions influencing, 286 ff. 
PHOXICHILIDIUM MAXILLARA: regenera- 
tion of, 338 ff. 
PHYSIOLOGICAL PROBLEMS: discussion 
of, 497 ff. 
PHYSIOLOGIC UNIT: idea of, 322. 
PIGMENT: relation of, to gravitation, 190; 
in Tubularia, 210; influence of lack of 
oxygen on, 420, 
PLAGIOTROPIC ORGANS: definition, 2. 
PuaANarta: heliotropism in, 73,77; pho- 
tokinesis in, 287; heteromorphosis in, 
344; brain physiology of, 352 i. 
PLANoRBIS: influence of light on seg- 
mentation of, 427. 
PLANT LICE: heliotropism in, 45, 49, 50, 
112; geotropism in, 50; temperature 
effects on, 51, 108: flight movements of, 
54; movements of, not voluntary, 109. 
PLANULA: influence of light on, 433. 
PLASMODIA: geotropism in, 179. 
PLUMULARIA PINNATA: heteromorpho- 
sis in, 187, 172. 
PopARKE: Parthenogenesis in, 682, 772. 
POLARITY: heliotropism as a factor in, 
76; Allmann’s theory of, 117, 129; as 
regards Tubularia mesembryanthe- 
mum, 128; in Cerianthus, 206, 215. 
PoLyGorDIvs; change of sense of heliot- 
zopem in, 273, 293, 417; locomotion in, 
Po.yps: formation of, 124. 
PORTHESIA CHRYSORRH@A : heliotropism 
in, 19, 24-37, 112; stereotropism in, 21. 
Porassium: effects of, on regeneration, 
242, 252; effects of, on Fundulus, 296, 297. 
Pressure: effects of, on so-called in- 
stinct, 110. 
ProtTopLasM: influence of light on, 6; 
movements of, 212; isotropy in, 334. 
Protozoa: heliotropism in, 7. 
PYcNOGONIDES: regeneration of, 338 ff. 
QUANTITY OF WATER: influence on re- 
generation and growth, 247, 252. 
RANA: influence of light on develop- 
ment of, 427. 
REFLEXEs: persistence of, in Ciona, 218; 
in Planaria, 355 ff. 
REGENERATION: Bonnet’s theory of, 119; 
definition of, 120; in Tubularia, 122; in 
Ciona intestinalis, 217; influence of 
concentration of sea-water on, 222; 
necessity of oxygen for, 240; relation 
of, to inorganic substances, 242, 245; 
influence of quantity of water on, 247, 
252; influence of magnesium on, 252; 
quantitative limits of, 336; general 
ideas on, 338; in Pantopods, 338; in 
Chetopods, 341; and nucleus, 505; of 
organs in Hydroids, 627 ff. 
RESEGMENTATION: of Ctenolabrus eggs 
without oxygen, 37%. 
RESPIRATORY ORGAN: effect of light on, 
RHEOTROPISM: in Eudendria, 141; in 
Plasmodia, 179, 182. 
RHIZOPODS: regeneration in, 507. 
SACCHAROMYCES CEREVISI®: a ferment 
for glucoses, 498. 
ScYLLIUM CANICULA: geotropism in, de- 
pendent on inner ear, 187. 
SEA-WATER: regeneration in, 222; con- 
centration of, and influence on longi- 
tudinal growth, 228; analysis of, 242; 
influence of concentration of, on seg- 
mentation, 257; effect of concentration 
of, on heliotropism, 279-82. 
SEGMENTATION: of nucleus without seg- 
mentation of protoplasm, 258. 
SERPULA: heliotropism in, 101, 106: pho- 
tokinesis in, 289, 
SERTULARIA HALECINA: heliotropism in, 
SERTULARIA  (POLYZONIAS): _heliotro- 
pism in, 103; heteromorphosis in, 142, 
173, 174, 249; change of sense of heliot- 
ropism in, 266 
SESSILE ANIMALS: 
90-106. ; ; 
SEXUALITY: relation of, to heliotropism, 
52, 68, 118. 
SHARKS: geotropism in, 186. 
SIAMESE TWINS: formation of, 304 ff. 
SnAILs: heliotropism in, 73. 
SoDIUM CHLORIDE: poisonous character 
of solution of, 544 ff. 
SPERMATOZOA: stereotropism of, 23, 111. 
oe EUPHORBIZ: heliotropism in, 
38 ff. 
heliotropism in, 
SPIROGRAPHIS SPALLANZANII: heliotro- 
pism in, 90-100; movements of, not in- 
stinctive, 107; change of sense of heli- 
otropism, 266. 
STENTOR VIRIDIS: influence of oxygen 
on, 15. 
STEREOTROPISM: definition of, 23; in 
Porthesia chrysorrhoea, 34; in Lepi- 
doptera, 54; in plant lice, 54; in ants, 
55: in June-bugs, 71: relation of, to in- 
stinct, 109, 111; in Tubularia mesem- 
bryanthemum, 121, 124; in Aglaophe- 
nia pluma, 139; in Plumularia, 148; in 
Sertularia, 143: in Hydroids 174; in 
Antennularia antennina, 251; in Lum- 
bricus foetidus, 360. 
STIMULATION: in heteromorphosis, 140; 
threshold of, 219: latent period of, 221. 
STRONGYLOCENTRATUS FRANCISCANUS: 
artificial parthenogenesis in, 626, 63%, 
STRONGYLOCENTRATUS PURPURATUS: ar- 
tificial parthenogenesis in, 626, 638, 644. 
SunLiIcuT: effect on Lepidoptera, 48; 
effect on Polygordius, 277. 
Digitized by Microsoft® 
