780 
STUDIES IN GENERAL PHYSIOLOGY 
JUNE-BUG LARV2: heliotropism of, 20, 71. 
Lack OF OXYGEN: influence of, on fish 
embryos, 309 ff.; and Perca fluviatilis, 
320; hysiological effects of, 370 ff.; 
and &o pepods, 373; and Ctenolabrus 
eggs, 374; influence of, on Fundulus 
eggs, 375, 397; and segmentation of egg, 
400 ff. ; and cardiac activity of fish em- 
bryox, 404; and Cyclas larvew, 417; and 
heliotropism, 417; and pigment cells, 
Leecues: heliotropism in, 73: oral end 
more sensitive to light, 78; stereotro- 
pism in, 79; lack of regeneration i in, 341 
ff.; brain physiology of, 361. 
LexDOPTRRA: heliotropism, in, 7, 37, 40, 
54, 56, 61, 74, 86; chemotropism in, 112. 
LeEucocytEs: migration of, due to 
stereotropism, 111. 
Licut: effect of direction of ray_on 
movements, 2, 4, a 16, 53. 91, 108. 265; 
effective rays of, 3,5 ; effect of change 
in intensity of, 3 27 276; effect of, on 
swarm-spores ot ‘alee, 33 effect of, on 
Lepidoptera, 7; effect of, on Protozoa, 
1s mechanical effects of, 7; effect of, 
on water fleas, 8; effect, of, on Daphnia, 
9; influencing ‘instinctive move- 
ments, 107, 109; effect of, on develop- 
ment of organs, 423 ff.; "effect of, on 
Fundulus embryos, 434 ‘ft. 
LIMULUS POLYPHEMUS: heliotropism in, 
267. 288%; locomotion dependent on 
sense of heliotropism of, 284. 
Louieo: heliotropism in, 291; geotro- 
pism in, 292. 
Loss oF WATER: effect of, on cleavage, 
258: influence of, on embryos, 309, 314.. 
ge a F@TIDUS: brain physiology 
of, 39 
LYMNUS STAGNALIS: growth in, 229. 
Macu#riTeEs: blindness of, as related 
to sex, 56. 
MARGELIS: heteromorphosis in, 628 ff. 
MATURATION: of unfertilized eggs of 
star-fish, 728 ff. 
Mepusa: periodic migration of, 366; ion- 
proteids in, 544; locomotion of, 553; 
effects of Ca ions on, 753. 
MELOLONTHA VULGARIS: 
in, 71 
MesocarPvs: influence of light on, 6. 
MeEramorPHOSIS: influence of central 
nervous system on, 436. 
MICELLA: conceptions of, 334. 
MIGRATIONS OF ANIMALS: influence of 
gr otrop(sm on, 180; physiological con- 
itions determining, 289 ff 
Morus: heliotropism in, 7, 38. 
MULTIPLE EMBRYOS: development of, 303. 
Musca voMIToriA: helitropism in, 56, 
113; stereotropism in, 64, 68; effect of 
heat on orientation of, 63; relation of 
orientation of, to chemical stimuli, 66: 
movements due to sum of stimuli, 1. 
heliotropism 
Muscue: absorption of water by, 510 ff.; 
rhythmical contractions of, ‘518 ff.; 
contact-irritability of, 692 ff.; produc- 
tion and suppression of twitchings of, 
by electrolytes, 748 ff. 
Mysip#: stereotropism in, 110. 
NEMERTINES: brain physiology of, 356 ff. 
NEREIS: brain physiology of, 358; artifi- 
cial parthenogenesis in, 773, 
NERVE: regeneration of, 217, 252; effects 
of fluorides on, 703 ff. 
Nucueus: effect of, on growth. 321 ff.; 
the organ of oxidation, 508. 
OcELLA: formation of, in Ciona, 216. 
CEpEMA: influence of osmotic pressure 
on, 471; increase in osmotic pressure of 
muscle causing, 515. 
ORAL PLATES: in Cerianthus, 159, 160. 
ORBITOLITES: changes of enucleated 
pieces of, 506, 507. 
ORGANIZATION: dependent on orienta- 
tion, 191, 192; relationship of, to 
growth, tou, 251; internal causes of, 
205; Sach’s theory of, 207, 211, 212, 215; 
Loeb’s theory of, 208; relationship of. 
to irritability, 213; in Ciona, 215; em- 
bryonal, 319. 
ORIENTATION: influence of direction of 
rays on, 2, 4, 5, 16, 53, 91, 108, 265; influ- 
ence of temperature, 3; influence of in- 
tensity of light on, 3, 4, 32; influence of 
physical laws on, 51: . influence of form 
of body on, 75; of plants, 109; com- 
position of forces in, 112; forms of irri- 
tability influencing, 174, 251; influence 
of gravitation on, 176. 177, 178; governs 
regeneration and heteromorphosis, 
ORTHOTROPISM: of organs, 2; in dorsi- 
ventral animals, 97. 
OsMOTIC PRESSURE: relation of, to 
growth, 228, 240; in bursting of egg- 
membrane, 308 ; relation of, to absorp- 
tion by muscle, 466; in parthenogenesis, 
640, 648 ff. 
OTOLITHS: 
187, 189 
OxyGEN (see Lack of Oxygen): rdle of, 
in heliotropism, 15; relation of, to re- 
generation, 240, 252: Hoppe- -Seyler’s 
theory of action’ of, Bil: relation of, to 
cleavage, 394; relation’ of, to growth, 
relation of, to geotropism, 
PANTOPODS: regeneration of, 338. 
PAPILIO MACHAON: heliotropism in, 42. 
PARTHENOGENESIS: artificial, 539 ff., 
638 ff.; in Arbacia, 576 ff., ce ff.; in 
Annelids (Chastopterus), 46 ff.; in 
Fundulus, 682; in Gocimeniie. 682; 
in Podarke, 682; in Phascolosoma, 
682,772; in Crustaceans, 684; sources of 
error in, 765 ff. 
PERCA FLUVIATILIS: 
oxygen on, 320. 
effect of lack of 
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